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Wearable Sensor Uses Ultrasound to Provide Cardiac Imaging On the Go

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Last Updated on February 10, 2023 by Daily News Staff

UC San Diego engineers lead development of a powerful new ultrasound sensor system for cardiac imaging that even works during a workout

Newswise — Engineers and physicians have developed a wearable ultrasound device that can assess both the structure and function of the human heart. The portable device, which is roughly the size of a postage stamp, can be worn for up to 24 hours and works even during strenuous exercise. 

The goal is to make ultrasound more accessible to a larger population, said Sheng Xu, a professor of nanoengineering at the University of California San Diego, who is leading the project. Currently, echocardiograms– ultrasound examinations for the heart– require highly trained technicians and bulky devices. 

“The technology enables anybody to use ultrasound imaging on the go,” Xu said. 

Thanks to custom AI algorithms, the device is capable of measuring how much blood the heart is pumping. This is important because the heart not pumping enough blood is at the root of most cardiovascular diseases. And issues with heart function often manifest only when the body is in motion. 

The work is described in the Jan. 25 issue of the journal Nature

Cardiac imaging is an essential clinical tool to assess long-term heart health, detect problems as they arise and care for critically ill patients. This new wearable, non-invasive heart monitor for humans provides real-time, automated insights on the difficult-to-capture pumping activity of the heart, even when a person is exercising. 

The wearable heart monitoring system uses ultrasound to continuously capture images of the four chambers of the heart in different angles, and analyze a clinically relevant subset of the images in real time using a custom-built AI technology. The project builds on the team’s previous advances in wearable imaging technologies for deep tissues.

“The increasing risk of heart diseases calls for more advanced and inclusive monitoring procedures,” Xu said. “By providing patients and doctors with more thorough details, continuous and real-time cardiac image monitoring is poised to fundamentally optimize and reshape the paradigm of cardiac diagnoses.”

In comparison, existing non-invasive methods have limited sampling capabilities and provide limited data. The wearable technology developed by Xu’s team enables safe, non-invasive and high-quality cardiac imaging, resulting in images with high spatial resolution, temporal resolution and contrast. “It also minimizes patient discomfort and overcomes some limitations of noninvasive technologies such as CT and PET, which could expose patients to radiation,” said Hao Huang, a PhD student in the Xu group at UC San Diego.

The unique design of the sensor makes it ideal for bodies in motion. “The device can be attached to the chest with minimal constraint to the subjects’ movement, even providing a continuous recording of cardiac activities before, during and after exercise,” said Xiaoxiang Gao, a postdoctoral researcher in the Xu group at UC San Diego.

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The importance of cardiac imaging

Cardiac diseases are the leading cause of death among the elderly, and are also becoming more prevalent among the young due to lifestyle factors. The signs of cardiac diseases are transient and unpredictable, making them hard to spot. This has upped demand for more advanced, inclusive, non-invasive and cost-effective monitoring technologies such as long-term cardiac imaging, which this wearable device facilitates.

Cardiac imaging is one of the most powerful tools for screening and diagnosing cardiac issues before they become problems. “The heart undergoes all kinds of different pathologies,” said Hongjie Hu, a postdoctoral researcher in the Xu lab at UC San Diego. “Cardiac imaging will disclose the true story underneath. Whether it be that a strong but normal contraction of heart chambers leads to the fluctuation of volumes, or that a cardiac morphological problem has occurred as an emergency, real-time image monitoring on the heart tells the whole picture in vivid detail and visual effect.”

How it works in detail

The new system gathers information through a wearable patch as soft as human skin, designed for optimal adherence. The patch measures 1.9 cm (L) x 2.2 cm (W) x 0.09 cm (T) , about the size of a postage stamp. It sends and receives the ultrasound waves which are used to generate a constant stream of images of the structure of the heart in real time. This ultrasound patch is soft and stretchable, and it adheres well to human skin, even during exercise.  

The system can examine the left ventricle of the heart in separate bi-plane views using ultrasound, generating more clinically useful images than were previously available. As a use case, the team demonstrated imaging of the heart during exercise, which is not possible with the rigid, cumbersome equipment used in clinical settings.

The performance of the heart is characterized by three factors: stroke volume (the volume of blood the heart pumps out each beat), ejection fraction (the percentage of blood pumped out of the left ventricle of the heart every beat) and cardiac output (the volume of blood the heart pumps out every minute). 

Xu’s team developed an algorithm to facilitate continuous, AI-assisted automatic processing. 

“A deep learning model automatically segments the shape of the left ventricle from the continuous image recording, extracting its volume frame-by-frame and yielding waveforms to measure stroke volume, cardiac output and ejection fraction,” said Mohan Li, a master’s student in the Xu group at UC San Diego. 

“Specifically, the AI component involves a deep learning model for image segmentation, an algorithm for heart volume calculation, and a data imputation algorithm,” said Ruixiang Qi, a master’s student in the Xu group at UC San Diego. “We use this machine learning model to calculate the heart volume based on the shape and area of the left ventricle segmentation. The imaging-segmentation deep learning model is the first to be functionalized in wearable ultrasound devices. It enables the device to provide accurate and continuous waveforms of key cardiac indices in different physical states, including static and after exercise, which has never been achieved before.”

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Thus, this technology can generate curves of these three indices continuously and noninvasively, as the AI component processes the continuous stream of images to generate numbers and curves.

To create the platform, the team faced some technical challenges that required careful decision-making. To produce the wearable device itself, the researchers used a piezoelectric 1-3 composite bonded with Ag-epoxy backing as the material for transducers in the ultrasound imager, reducing risk and improving efficiency over previous methods. When choosing the transmission configuration of the transducer array, they achieved superior results through wide-beam compounding transmission. They also selected from nine popular models for machine-learning-based image segmentation, landing on FCN-32, which achieved the highest possible accuracy.

In the current iteration, the patch is connected through cables to a computer, which can download the data automatically while the patch is still on. The team has developed a wireless circuit for the patch, which will be covered in a forthcoming publication.

Next steps

Xu plans to commercialize this technology through Softsonics, a company spun off from UC San Diego that he cofounded with engineer Shu Xiang. He also encourages others in his scientific community to follow his lead and work on areas of this research that warrant further exploration.

To follow up on these results, Xu recommends four immediate next steps:

  • B-mode imaging, which allows more diagnostic capabilities involving different organs
  • The design of the soft imager, which allows researchers to fabricate large transducer probes that cover multiple positions simultaneously
  • Miniaturization of the back-end system that powers the soft imager
  • Working toward a general machine learning model that fits more subjects

This work was supported by the National Institutes of Health (1R21EB025521-01, 1R21EB027303-01A1, 3R21EB027303-02S1, and 1R01EB033464-01).

Financial disclosures: Shu Xiang and Sheng Xu are cofounders of Softsonics, the company that is commercializing this technology.

Paper: “A wearable cardiac ultrasound imager” 

Coauthors include Hongjie Hu* and Hao Huang*, Department of Nanoengineering, UC San Diego; Mohan Li*, Department of Electrical and Computer Engineering, UC San Diego; Xiaoxiang Gao* and Lu Yin, Department of Nanoengineering, UC San Diego; Ruixiang Qi, Department of Computer Science and Engineering, UC San Diego; Ray S. Wu, Department of Nanoengineering, UC San Diego; Xiangjun Chen, Materials Science and Engineering Program, UC San Diego; Yuxiang Ma, Department of Nanoengineering, UC San Diego and Department of Mechanical Engineering, Massachusetts Institute of Technology; Keren Shi, Materials Science and Engineering Program, UC San Diego and Materials Science and Engineering Program, UC Riverside; Chenghai Li, Department of Mechanical and Aerospace Engineering, UC San Diego; Timothy M. Maus, Department of Anesthesiology, UC San Diego Health-Sulpizio Cardiovascular Center; Brady Huang, Department of Radiology, School of Medicine, UC San Diego; Chengchangfeng Lu, Department of Electrical and Computer Engineering, UC San Diego; Muyang Lin, Department of Nanoengineering, UC San Diego; Sai Zhou, Materials Science and Engineering Program, UC San Diego; Zhiyuan Lou, Department of Nanoengineering, UC San Diego; Yue Gu, Materials Science and Engineering Program, UC San Diego and Department of Neurosurgery, Yale University; Yimu Chen, Department of Nanoengineering, UC San Diego; Yusheng Lei, Department of Nanoengineering, UC San Diego and Department of Chemical Engineering, Stanford University; Xinyu Wang, Ruotao Wang and Wentong Yue, Department of Nanoengineering, UC San Diego; Xinyi Yang, Materials Science and Engineering Program, UC San Diego; Yizhou Bian, Department of Nanoengineering, UC San Diego; Jing Mu, Materials Science and Engineering Program, UC San Diego;  Geonho Park, Department of Nanoengineering, UC San Diego; Shu Xiang, Softsonics, Inc.; Shengqiang Cai, Materials Science and Engineering Program and Department of Mechanical and Aerospace Engineering, UC San Diego; Paul W. Corey, Department of Anesthesiology, Sharp Memorial Hospital; Joseph Wang, Department of Nanoengineering and Materials Science and Engineering Program, UC San Diego, and Sheng Xu, Department of Nanoengineering, Department of Electrical and Computer Engineering, Materials Science and Engineering Program and Department of Bioengineering, UC San Diego; Department of Radiology, School of Medicine, UC San Diego; and Softsonics, Inc.

Source: Emerson Dameron University of California San Diego

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Bad Bunny’s Super Bowl Halftime Show Fits the NFL’s Long Game to Win Latin America

The NFL aims to expand its reach into Latin America through strategic marketing and high-profile performers like Bad Bunny at the Super Bowl halftime show. While the choice has sparked controversy, particularly among conservatives, the league sees it as a business move to attract more fans, particularly in Mexico and Brazil.

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Bad Bunny: Concert crowd with illuminated stage
Bad Bunny performs on stage on Dec. 11, 2025, in Mexico City, Mexico. Emma McIntyre/Getty Images

Jared Bahir Browsh, University of Colorado Boulder

Bad Bunny’s Super Bowl show is part of long play drawn up by NFL to score with Latin America

Donald Trump, it is fair to assume, will be switching channels during this year’s Super Bowl halftime show.

The U.S. president has already said that he won’t be attending Super Bowl LX in person, suggesting that the venue, Levi’s Stadium in Santa Clara, California, was “just too far away.” But the choice of celebrity entertainment planned for the main break – Puerto Rican reggaeton star Bad Bunny and recently announced pregame addition Green Day – didn’t appeal. “I’m anti-them. I think it’s a terrible choice. All it does is sow hatred. Terrible,” Trump told the New York Post.

National Football League Commissioner Roger Goodell likely didn’t have the sensibilities of the U.S. president in mind when the choice of Bad Bunny was made.

One of the top artists in the world, Bad Bunny performs primarily in Spanish and has been critical of immigration enforcement, which factored into the backlash in some conservative circles to the choice. Bad Bunny’s anti-ICE comments at this year’s Grammy Awards will have only stoked the ire of some conservatives.

But for the NFL hierarchy, this was likely a business decision, not a political one. The league has its eyes on expansion into Latin America; Bad Bunny, they hope, will be a ratings-winning means to an end. It has made such bets in the past. In 2020, Shakira and Jennifer Lopez were chosen to perform, with Bad Bunny making an appearance. The choice then, too, was seen as controversial.

A man dressed in silver sings while crouched over a woman.
Shakira and Bad Bunny perform during the Pepsi Super Bowl LIV Halftime Show on Feb. 2, 2020, in Miami, Fla. Al Bello/Getty Images

Raising the flag overseas

As a teacher and scholar of critical sports studies, I study the global growth of U.S.-based sports leagues overseas.

Some, like the National Basketball Association, are at an advantage. The sport is played around the globe and has large support bases in Asia – notably in the Philippines and China – as well as in Europe, Australia and Canada.

The NFL, by contrast, is largely entering markets that have comparatively little knowledge and experience with football and its players.

The league has opted for a multiprong approach to attracting international fans, including lobbying to get flag football into the 2028 Olympics in Los Angeles.

Playing the field

When it comes to the traditional tackle game, the NFL has held global aspirations for over three-quarters of a century. Between 1950-1961, before they merged, the NFL and American Football League played seven games against teams in Canada’s CFL to strengthen the relationship between the two nations’ leagues.

Developing a fan base south of the border has long been part of the plan.

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The first international exhibition game between two NFL teams was supposed to take place in Mexico City in 1968. But Mexican protest over the economy and cost of staging the Olympics that year led the game, between the Detroit Lions and Philadelphia Eagles, to be canceled.

Instead, it was Montreal that staged the first international exhibition match the following year.

In 1986, the NFL added an annual international preseason game, the “American Bowl,” to reach international fans, including several games in Mexico City and one in Monterrey.

But the more concerted effort was to grow football in the potentially lucrative, and familiar, European market.

After several attempts by the NFL and other entities in the 1970s and ’80s to establish an international football league, the NFL-backed World League of Football launched in 1991. Featuring six teams from the United States, one from Canada and three from Europe, the spring league lost money but provided evidence that there was a market for American football in Europe, leading to the establishment of NFL Europe.

But NFL bosses have long had wider ambitions. The league staged 13 games in Tokyo, beginning in 1976, and planned exhibitions for 2007 and 2009 in China that were ultimately canceled. These attempts did not have the same success as in Europe.

Beyond exhibitions

The NFL’s outreach in Latin America has been decades in the making. After six exhibition matches in Mexico between 1978 and 2001, the NFL chose Mexico City as the venue of its first regular season game outside the United States.

In 2005, it pitted the Arizona Cardinals against the San Francisco 49ers at Estadio Azteca in Mexico City. Marketed as “Fútbol Americano,” it drew the largest attendance in NFL history, with over 103,000 spectators.

The following year, Goodell was named commissioner and announced that the NFL would focus future international efforts on regular-season games.

The U.K. was a safe bet due to the established stadium infrastructure and the country’s small but passionate fan base. The NFL International Series was played exclusively in London between 2007 and 2016.

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But in 2016, the NFL finally returned to Mexico City, staging a regular-season game between the Oakland – now Las Vegas – Raiders and Houston Texans.

And after the completion of upgrades to Latin America’s largest stadium, Estadio Azteca, the NFL will return to Mexico City in 2026, along with games in Munich, Berlin and London. Future plans include expanding the series to include Sydney, Australia, and Rio de Janeiro, Brazil, in 2026.

The International Player Pathway program also offers players from outside the United States an opportunity to train and earn a roster spot on an NFL team. The hope is that future Latin American players could help expand the sport in their home countries, similar to how Yao Ming expanded the NBA fan base in China after joining the Houston Rockets, and Shohei Ohtani did the same for baseball in Japan while playing in Los Angeles.

Heading south of the border

The NFL’s strategy has gained the league a foothold in Latin America.

Mexico and Brazil have become the two largest international markets for the NFL, with nearly 40 million fans in each of the nations.

Although this represents a fraction of the overall sports fans in each nation, the raw numbers match the overall Latino fan base in the United States. In recent years the NFL has celebrated Latino Heritage Month through its Por La Cultura campaign, highlighting Latino players past and present.

Latin America also offers practical advantages. Mexico has long had access to NFL games as the southern neighbor to the United States, with the Dallas Cowboys among the most popular teams in Mexico.

For broadcasters, Central and South America offer less disruption in regards to time zones. Games in Europe start as early as 6:30 a.m. for West Coast fans, whereas Mexico City follows Central time, and Brasilia time is only one to two hours ahead of Eastern time.

A man in a bowtie holds three trophies.
Bad Bunny poses with the Album of the Year, Best Música Urbana Album and Best Global Music Performance awards during the 68th Grammy Awards on Feb. 1, 2026, in Los Angeles. Matt Winkelmeyer/Getty Images for The Recording Academy

The NFL’s expansion plans are not without criticism. Domestically, fans have complained that teams playing outside the U.S. borders means one less home game for season-ticket holders. And some teams have embraced international games more than others.

Another criticism is the league, which has reported revenues of over US$23 billion during the 2024-25 season – nearly double any other U.S.-based league – is using its resources to displace local sports. There are also those who see expansion of the league as a form of cultural imperialism. These criticisms often intersect with long-held ideas around the league promoting militarism, nationalism and American exceptionalism.

Bad Bunny: No Hail Mary attempt

For sure, the choice of Bad Bunny as the halftime pick is controversial, given the current political climate around immigration. The artist removed tour dates on the U.S. mainland in 2025 due to concerns about ICE targeting fans at his concerts, a concern reinforced by threats from the Department of Homeland Security that they would do just that at the Super Bowl.

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But in sticking with Bad Bunny, the NFL is showing it is willing to face down a section of its traditional support and bet instead on Latin American fans not just tuning in for the halftime show but for the whole game – and falling in love with football, too.

Jared Bahir Browsh, Assistant Teaching Professor of Critical Sports Studies, University of Colorado Boulder

This article is republished from The Conversation under a Creative Commons license. Read the original article.


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Broncos ‘Private’ Stadium Plan: How Tax Breaks and Infrastructure Can Still Cost the Public Millions

Broncos ‘Private’ Stadium Plan: In September 2025, the Denver Broncos announced plans for a new privately financed stadium. However, scrutiny arises as public funds often subsidize these projects, obscuring true financing sources. This raises concerns about the long-term financial impact on taxpayers, who may shoulder broader costs beyond construction, including infrastructure and social ramifications.

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Stadium entrance with people outside.Broncos ‘Private’ Stadium Plan
In September 2025, the Denver Broncos announced their plan to build a new, privately financed stadium. Icon Sportswire/Getty Images

Geoffrey Propheter, University of Colorado Denver

Broncos say their new stadium will be ‘privately financed,’ but ‘private’ often still means hundreds of millions in public resources

The Denver Broncos announced in early September 2025 their plan to build a privately financed football stadium. The proposal received a lot of attention and praise.

Across the five major sports leagues in the U.S. – the NBA, NHL, NFL, MLB and MLS – only 20% of facilities are privately owned.

I’ve studied the intersection of state and local public finance and pro sports for two decades. This experience has led me to approach claims of private financing with suspicion.

Private dollars are often masked as public dollars in these arrangements. https://www.youtube.com/embed/zwv34Lpo0ec?wmode=transparent&start=0 A Fox31 Denver news report aired in November 2025 about the Broncos’ plans for a new stadium.

Private vs public dollars

In theory, what counts as private or public dollars is uncontroversial. Dollars are public when government has a legal claim over them – otherwise, they are private.

The public versus private dollar distinction matters when accounting for who is contributing how much to a sports facility. When public dollars are allowed to count as private dollars, a project proposal looks more enticing than it is, in fact.

For instance, lawmakers regularly allow team owners to count public dollars as private dollars. The Sacramento City Council agreed to let the NBA’s Sacramento Kings count their property tax payments for the city-owned arena as private contributions to the overall cost of financing the arena. But property taxes are public dollars that in other instances go toward public services like schools and road repairs.

A building at night is lit up with purple lights that read
The Sacramento Kings stadium, the Golden 1 Center, counts property tax payments as a private contribution, even though property taxes are public dollars. Thearon W. Henderson/Getty Images

Team owners building private facilities also typically receive public dollars through tax breaks, which is government spending in disguise. Property tax exemptions, sales and use tax exemptions on materials and machinery, and income tax credits are common forms of government givebacks to sports team owners.

I’ve estimated that property tax exemptions alone, among facilities in the five major leagues, have cost state and local governments US$20 billion cumulatively over the life of teams’ leases, 42% of which would have gone to K-12 education.

Rental payments spent on facilities are not private dollars

Many facilities and their infrastructure are funded through public debt secured in part by team rental payments. Lawmakers, media and consultants often view projects secured by rents as privately financed, in part or whole.

However, rental income in exchange for use or operation of public property should not be counted as private dollars.

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Here’s a thought experiment. Suppose state lawmakers allocated the rent paid for use of campground sites in a state park to pay for new campground bathrooms. Are the bathrooms privately funded?

The flaw in concluding “yes” arises from a failure to appreciate that lawmakers, through policy, create legal claims over certain dollars. All dollars start as private dollars, but through the tax system, lawmakers transfer ownership of some dollars to the public.

It is the government landlord’s choice, a policy decision, to spend the rental income on the rented property, a choice available to them only if they own the rental income in the first place.

Yet lawmakers regularly allow teams, both professional and minor league, to count rental payments as private contributions. This accounting makes sports subsidies look less generous than they actually are.

Looking beyond construction

Facilities not only need to be constructed but also operated, maintained and eventually upgraded. Roads, sewer lines, overpasses, game-day security and emergency response and public policies to mitigate gentrification caused by a facility are all common taxpayer-funded touchpoints. In addition, facilities have preconstruction costs such as land acquisition, soil remediation and site preparation, as well as later costs such as demolition and remediation for the land’s next use.

Focusing on privately financed construction and ignoring all other aspects of a project’s development and operation is misleading, potentially contributing to lawmakers making inefficient and expensive policy decisions.

Outer wall of a stadium under construction.
The Buffalo Bills’ stadium. Aaron M. Sprecher/Getty Images

By way of example, the Council of the District of Columbia approved a subsidy agreement last year with the NFL’s Commanders. The stadium would be financed, constructed and operated by the team owner, who would pay $1 in rent per year and remit no property taxes. In exchange for financing the stadium privately, the owner receives exclusive development rights to 20 acres of land adjacent to the stadium for the next 90 years.

The stadium is expected to cost the owner $2.5 billion, with the city contributing $1.3 billion for infrastructure.

But the city also gives up market rental income between $6 billion and $25 billion,depending on future land appreciation rates, that it could make on the 20 acres.

In other words, the rent discount alone means the city gives up revenue equal to multiple stadiums in exchange for the Commanders providing one. It is as if the council has a Lamborghini, traded it straight up for a Honda Civic, and then praised themselves for their negotiation acumen that resulted in a “free” Civic.

The Broncos’ proposed stadium

As of January 2026, Denver taxpayers know only that the Broncos stadium construction will be privately financed and that public dollars will be spent on some infrastructure.

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Being enamored with such a proposal is similar to being offered a $1 billion yacht at a 75% discount. In my experience, there are two types of public officials: one will want to spend $250 million to save $750 million, while the other will ask whether $250 million for a yacht is an appropriate use of taxpayer resources given existing needs elsewhere.

My hope is that lawmakers better appreciate the many ways government participation in sports facility development, including privately financed ones, imposes serious risks and costs for current and future taxpayers. What is the expected total cost of the stadium project over its life? How much of the life cost would public resources cover? Could public resources generate greater benefits in an alternative use? How much will it cost to mitigate or compensate those affected by a project’s expected negative side effects, such as gentrification, congestion, pollution and crime?

Read more of our stories about Colorado.

Geoffrey Propheter, Associate Professor, School of Public Affairs, University of Colorado Denver

This article is republished from The Conversation under a Creative Commons license. Read the original article.


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How the explosion of prop betting threatens the integrity of pro sports

Miami Heat guard Terry Rozier was among 34 individuals arrested in connection with federal investigations into illegal gambling, highlighting a growing concern in sports. Prop bets, which allow wagering on specific game outcomes, have become prevalent, increasing the risk of corruption and match-fixing. The global sports betting market is expanding rapidly, raising alarms about integrity in sports.

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Miami Heat guard Terry Rozier was one of 34 people arrested as part of a wide-ranging investigation into illegal gambling. Scott Taetsch/Getty Images

John Affleck, Penn State

When I first heard about the arrests of Portland Trail Blazers coach Chauncey Billups, Miami Heat guard Terry Rozier and former NBA player Damon Jones in connection to federal investigations involving illegal gambling, I couldn’t help but think of a recent moment in my sports writing class.

I was showing my students a clip from an NFL game between the Jacksonville Jaguars and Kansas City Chiefs. Near the end of play, Jaguars quarterback Trevor Lawrence threw a perfect pass to receiver Brian Jones Jr. to secure a critical first down. Out of the blue, a student groaned and said that he’d lost US$50 on that throw.

I thought of that moment because it revealed how ubiquitous sports betting has become, how much the types of bets have changed over time, and – given these trends – how it’s naive to think players won’t continue to be tempted to game the system.

The prop bet hits it big

I’ve been following the evolution of sports gambling for about a decade in my position as chair of Penn State’s sports journalism program.

Back when legal American sports betting was mostly confined to Las Vegas, the standard bets tended to be tied to picking a winner or which team would cover a point spread.

But ahead of the 1986 Super Bowl between the Chicago Bears and the overmatched New England Patriots, casinos offered bets on whether Bears defensive lineman – and occasional running back – William “Refrigerator” Perry would score a touchdown. The excitement around that sideshow kept fan interest going during a 46-10 blowout.

Perry did end up scoring, and the prop bet took off from there.

Prop bets are wagers that depend on an outcome within a game but not its final result. They can often involve an athlete’s individual performance in some statistical category – for instance, how many yards a running back will rush for, how many rebounds a basketball center will secure, or how many strikeouts a pitcher will have. They’ve become routine offerings on sports betting menus.

For example: As I write this, I am looking at a FanDuel account I opened years ago, seeing that, for the Green Bay Packers-Pittsburgh Steelers game currently in progress, I can place a wager on which player will score a touchdown, how many yards each quarterback will throw for and much, much more. As the game progresses, the odds constantly shift – allowing for what are called “live bets.”

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Returning to my student who lost the bet on Lawrence’s pass completion: It’s possible he’d placed a bet on Lawrence to throw fewer than a set number of yards. Or he could have been part of a fantasy league, which is also dependent on individual player performances.

Either way, a problem with prop bets, from an anti-corruption perspective, is that an individual can often control the outcome. You don’t need a group of players to be in on it – which is what happened during the infamous Black Sox Scandal, when eight players on the Chicago White Sox were accused of conspiring with gamblers to intentionally lose the 1919 World Series.

In the indictment against him, Rozier is accused of telling a co-defendant to pass along information to particular bettors that he planned to leave a March 2023 game early – a move everyone involved knew meant he would not reach his statistical benchmarks for the game. They could then place bets that he wouldn’t hit those marks.

In baseball, meanwhile, Luis Ortiz of the Cleveland Guardians was placed on leave during the 2025 season and is under investigation for possibly illegally wagering on the outcome of two pitches he threw. MLB authorities are essentially trying to determine if he deliberately threw balls as opposed to strikes in two instances. (Yes, prop bets have become so granular that you can even bet on whether a pitcher will throw a ball or a strike on an individual pitch.)

An exploding market with no end in sight

The popularity of prop bets feeds into a worldwide sports gambling industry that has experienced explosive growth and shows no sign of slowing.

Since the U.S. Supreme Court in 2018 ruled that states could decide on whether to allow sports betting, 39 states plus the District of Columbia have done so.

The leagues and media are more than just bystanders. FanDuel and DraftKings are official sports betting partners of the NBA and the NFL.

In the days after the Supreme Court ruling, I wondered whether journalists would embrace sports betting. These days, ESPN not only has a betting show, but it also has a betting app.

According to the American Gaming Association, sportsbooks collected a record $13.71 billion in revenue in 2024 from about $150 billion in wagers. A study released in February 2025 by Siena and St. Bonaventure universities found that nearly half of American men have an online sports betting account.

But those figures don’t begin to touch the worldwide sports betting market, especially the illegal one. The United Nations, in a 2021 report, reported that up to $1.7 trillion is wagered annually in illegal betting markets.

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The U.N. report warned that it had found a “staggering scale, manifestation, and complexity of corruption and organized crime in sport at the global, regional, and national levels.”

Who’s the boss?

In early October 2025, I attended a conference of Play the Game, a Denmark-based organization that promotes “democratic values in world sports.” Its occasional gatherings attract experts from around the world who are interested in keeping sports fair and safe for everyone.

One of the most sobering topics was illegal, online sportsbooks that feature wagering on all levels of sport, from the lowest levels of European soccer on up.

It sounded somewhat familiar. This summer at the Little League World Series, which my students covered for The Associated Press, managers complained about offshore sportsbooks offering lines on the tournament, which is played by 12-year-old amateurs.

And with so much illegal wagering in the world, the issue of match fixing was bound to come up.

One session screened a recent German documentary on match fixing. Meanwhile, Anca-Maria Gherghel, a Ph.D. candidate at Sheffield Hallam University and senior researcher for EPIC Global Solutions, both in northern England, told me how she had interviewed a professional female soccer player for a team in Cyprus. The player described how she and her teammates were routinely approached with lucrative offers to throw matches.

Put it all together – the vast sums of money at play and the relative ease of fixing a prop bet, let alone a match – and you cannot be surprised at the NBA scandal.

I used to think that gambling was just a segment of the larger sports industry. Now, I wonder whether I had it exactly backward.

Has sports just become a segment of the larger gambling industry?

John Affleck, Knight Chair in Sports Journalism and Society, Penn State

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This article is republished from The Conversation under a Creative Commons license. Read the original article.

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