As sports betting surges across the United States, researchers are raising alarms about the risks tied to prop bets and micro-wagers that happen in seconds. A leading problem-gambling scholar says the speed and volume of these bets may heighten the risk of addiction for some players.
“Because prop bets speed up the ability to make multiple bets, they carry a higher risk of developing addictive behavior for some bettors,” said researcher Rachel Volberg in a recent interview. Her warning comes as more states expand legal sports wagering and as sportsbooks promote in-game options that let customers keep betting while the action unfolds.
Why Prop Bets Are Different
Prop bets, short for proposition bets, are wagers on specific outcomes inside a game. These can range from how many rebounds a player collects to whether the next drive ends in a field goal. In recent years, sportsbooks have added “micro-bets” that settle in minutes or even seconds, such as the result of a single pitch or play.
Researchers point to speed and repetition as key risk factors. Shorter intervals between bets reduce cooling-off periods. Quick settlement can encourage chase behavior, which is when a bettor tries to win back losses with more bets. This feedback loop can be especially risky for people vulnerable to gambling problems.
“Because prop bets speed up the ability to make multiple bets,” Volberg said, “they carry a higher risk of developing addictive behavior for some bettors.”
A Fast-Growing Market
Sports betting grew rapidly after a 2018 Supreme Court decision allowed states to legalize it. More than half the country now permits some form of sports wagering, and online platforms have made it easy to bet from home or a phone. Prop bets have become a major part of the product mix, especially during big events and in professional leagues with lengthy seasons.
Industry reports show a steady rise in total amounts wagered each year since legalization. Advocacy groups also report increased calls and messages to problem gambling helplines. While many factors contribute to those trends, public health experts say the expansion of high-frequency betting products deserves close attention.
Balancing Entertainment and Risk
Sportsbooks argue that prop bets add fun and personalization. They also point to responsible gambling tools that allow customers to set limits or take breaks. Standard features include:
- Deposit, time, and loss limits
- Cooling-off and self-exclusion options
- Prominent links to helplines and support
Leagues and regulators are taking a closer look as well. Several states have limited prop bets on college athletes after concerns about harassment and integrity. The NCAA has urged broader restrictions on player-specific props. Some professional leagues have tightened rules on data sharing and are working with integrity monitors to track unusual betting patterns.
What the Research Suggests
Public health researchers describe prop and micro-betting as high-intensity forms of gambling. The short time between wager and result can trigger repeated play. For people at risk, that repetition can escalate losses quickly. Experts compare the design to features seen in electronic gaming machines, where rapid cycles and variable rewards can drive compulsive behavior.
Volberg and other scholars call for more data sharing to study outcomes by product type. They also support clearer default settings to slow betting speed, stronger advertising rules, and better age and identity verification. Education campaigns, they say, should highlight how quick-settling bets differ from traditional pregame wagers.
Consumers Weigh the Trade-Offs
Bettors describe prop bets as engaging and social, especially when watching with friends. Yet some report losing track of spending during in-game betting streaks. Harm-minimization experts suggest simple steps for casual players: decide a budget before the game, avoid betting while upset, and set app limits in advance rather than in the moment.
Advocates add that clear win-loss tracking and pop-up reminders can help bettors pause and reassess. They also urge families to talk about betting the way they do about alcohol use. Open conversation, they say, can reduce stigma and make it easier to seek help early.
Prop bets will remain a draw as sportsbooks compete on features and live markets. The question now is how regulators, leagues, and operators manage the speed of these products while protecting fans. Volberg’s caution stands out: faster bets can mean faster harm for a slice of the audience. The next phase of policy will test whether the thrill of in-game action can coexist with stronger guardrails that slow the pace when it matters most.
