After more than half of all states have legalized sports betting, the league is stepping up efforts to identify bad bettors and help them get back on track. That includes more staff and better technology to track where and who is placing bets. It also includes working with integrity firms to make it easier for them to detect suspicious betting activity.

Official betting, or prop bets, are wagers on aspects of a game that don’t affect its outcome, such as how many touchdowns Patrick Mahomes will score or which team will win a specific quarter. Typically, these bets are placed online or in person at sportsbooks. But they can also be made via phone or tablet and are a growing part of the gambling industry.

It’s a relatively new phenomenon, and one that’s becoming more common as states legalize sports betting. In fact, a recent survey found that 58% of college-age Americans reported making at least one bet in the past year. The league is concerned that if these bets are not managed responsibly, they can harm the well-being of student-athletes and the integrity of NCAA competition.

But so far, there have been only a handful of cases where NFL players or their team employees have violated the league’s gambling policy. And while some of those violations have been inadvertent — Detroit Lions defensive tackle Isaiah Williams and free agent Rashod Berry were suspended this week for violating the policy when they made prop bets on NFL games — others have not.