Oklahoma quarterback John Mateer is facing scrutiny after screenshots of his Venmo history began circulating on social media. The images, tied to his freshman year at Washington State in 2022, contained memo descriptions explicitly citing “sports gambling.”
NCAA rules ban student-athletes from betting on any sport, with violations carrying penalties such as suspensions or permanent loss of eligibility. The case has amplified warnings from cybersecurity experts about the permanence of digital records.
Venmo Controversy Around John Mateer Spurs Cybersecurity Warnings for Athletes
Oklahoma quarterback Mateer has become the focus of intense discussion after screenshots of his Venmo activity surfaced online this week. Under NCAA rules, student-athletes are prohibited from betting on any sport, and violations can potentially result in suspensions or loss of eligibility.
Mateer, who transferred to Oklahoma in December, addressed the matter in a statement on Tuesday. “My previous Venmo descriptions did not accurately portray the transactions in question but were instead inside jokes between me and my friends,” he said. “I have never bet on sports. I understand the seriousness of the matter, but recognize that, taken out of context, those Venmo descriptions suggest otherwise.”
— John Mateer (@John_Mateer4) August 12, 2025
Cybersecurity experts consulted by “Front Office Sports” warn that the incident underscores the risks of leaving financial transaction histories visible to the public. Roman Yampolskiy, director of the cybersecurity laboratory at the University of Louisville, explained that, “Public financial transaction histories, even when they seem innocuous, can reveal sensitive behavioral data.”
He noted that such records suggest that “for high-profile athletes, these records can expose patterns of spending, locations, and relationships, making them targets for scams, blackmail, or unwanted public scrutiny.”
Yampolskiy emphasized that NCAA athletes, bound by strict compliance standards, should take extra precautions to keep financial activity private. He pointed out that Venmo requires a payment note, and if the account’s privacy settings are not secured, these descriptions can “create the perception, or evidence, of rule violations.”
He called it not only a privacy concern but also “a reputational and career risk management issue.”
MORE: Paul Finebaum Explains Future of John Mateer Fiasco and Has a Go at NCAA President Charlie Baker
The release of Mateer’s transactions prompted a wave of similar activity among college football fans, who began combing through rosters and posting screenshots of other players’ Venmo histories. Many athletes quickly switched their accounts to private or deleted them altogether.
According to “Front Office Sports,” schools such as Oklahoma, Oklahoma State, Ohio State, North Carolina State, Texas Tech, and South Carolina said they have no specific policies regarding payment app privacy. The SEC and Washington State declined to comment.
Behzadan called the episode “a stark reminder of how quickly a digital ‘paper trail’ can spiral out of control,” warning that seemingly casual or humorous payment descriptions can take on unintended meaning when exposed to a national audience.
