Sixteen months aft a landmark determination opened nan doorway for ineligible sports gambling successful nan United States, a high-ranking NFL executive sat earlier a House committee successful nan autumn of 2019 to inquire for thief banishing a peculiar type of stake that has drawn nan ire of sports leagues crossed nan country.
Proposition bets, amended known arsenic “prop bets,” let wagers not connected nan outcomes of games but connected occurrences during them. A wager could beryllium connected nan consequence nan first play of a game, nan first transportation of an inning aliases whether a subordinate will compile complete aliases nether a definite number of rebounds, strikeouts aliases rushing yards. Leagues, arsenic nan NFL indicated that time successful beforehand of lawmakers, see specified props troublesome and much easy manipulated because galore hinge connected nan actions of conscionable 1 player.
“These types of bets are importantly much susceptible to match-fixing efforts and are truthful a root of interest to sports leagues, individual teams and nan athletes who compete,” NFL Executive Vice President Jocelyn Moore testified successful 2019. (Moore, who has served connected nan committee of board of DraftKings since 2020, declined to comment.)
Had you placed a stake past that prop bets would spell away, you would person ended up a loser.
When nan NFL staged nan Super Bowl betwixt nan Los Angeles Rams and nan New England Patriots 5 months aft nan NFL’s testimony, bettors could still take among hundreds of prop bets. And six years later, they are still a root of headlines, interest for leagues and income for sportsbooks.
In 2024, nan NBA banned nan Toronto Raptors’ Jontay Porter for life for sports betting aft an investigation recovered he had, among different findings, “limited his ain information to power nan result of 1 aliases much bets connected his capacity successful astatine slightest 1 Raptors game.” In June, reports surfaced that a federal investigation into longtime NBA defender Malik Beasley was related to activity astir prop bets.
“I do deliberation immoderate of nan bets are problematic," NBA Commissioner Adam Silver said successful July, nan period Major League Baseball placed a Cleveland Guardians pitcher connected paid time off while it investigated unusually precocious wagers connected nan first pitches of innings connected June 15 and June 27, ESPN reported.
Weeks later, aft MLB placed a 2nd Guardians pitcher connected time off arsenic part of a sports gambling investigation, MLB Commissioner Rob Manfred told a group of shot writers that location were “certain types of bets that onslaught maine arsenic unnecessary and peculiarly vulnerable, things wherever it’s 1 azygous enactment [and] doesn’t impact nan outcome, necessarily.”

Whether MLB considers prop bets “unnecessary” capable to effort to person its gambling partners restrict nan kinds that are offered is unclear. But if MLB does, it mightiness look to nan NBA for a imaginable blueprint.
During nan 2024-25 NBA season, nan league’s gambling partners including FanDuel, DraftKings, BetMGM and respective others who dress up upward of 95% of nan ineligible U.S. sportsbooks agreed to nary longer connection “under” prop bets connected players either connected 10-day aliases two-way contracts. (Porter had been connected a two-way contract.) Fans could still stake connected nan sport's large names, for illustration Stephen Curry’s 3-pointers aliases LeBron James’ rebounds — but ineligible sports betting operators successful nan United States were nary longer offering action connected nan NBA’s lowest-paid players.
The determination wasn't a instruction handed down solely by nan NBA.
“We do not person power complete nan circumstantial bets that are made connected our game,” Silver said successful July. Years earlier, nan convention had sought conscionable that type of power, but it was unsuccessful successful persuading authorities lawmakers to walk authorities that would person fixed nan NBA nan correct to o.k. what types of bets could beryllium offered connected nan league. It besides doesn’t clasp veto authorities complete what its gambling partners tin and cannot offer, according to sources pinch knowledge of nan situation.
Instead, overmuch for illustration nan NFL’s effort successful its legislature grounds six years earlier, nan NBA had to inquire for help.
Representatives for DraftKings and FanDuel didn’t respond to requests for remark connected their back-and-forth pinch nan convention that led to nan decisions to restrict definite prop bets. Multiple group pinch knowledge of nan business not authorized to speak publically connected delicate discussions said nan convention had to trust connected making nan lawsuit to its partners that prop bets connected 10-day and two-way players weren’t worthy nan comparatively mini magnitude of business they brought in.
“It’s a mini portion of nan marketplace,” a personification progressive successful nan process said, “but had outsized integrity risks.”
Such speech betwixt a convention and a sportsbook would person been unthinkable earlier nan Supreme Court’s 2018 determination to overturn a national prohibition connected sports gambling freed states to determine whether to licence ineligible sports betting. (Thirty-eight states and nan District of Columbia let sports gambling, and Missouri is group to motorboat its ain cognition successful December.) Almost overnight, leagues and sportsbooks that erstwhile steered clear of 1 different were now successful business together.
Sometimes, nan back-and-forth betwixt a convention and its sportsbook partners has stopped bets from appearing earlier they are moreover listed. In 2020, pinch leagues still months distant from making a pandemic comeback, ESPN scrambled to capable programming that included NBA players’ competing against 1 different successful video games and moreover HORSE. As those competitions were announced, nan NBA was contacted by betting operators and regulators who wanted to cognize whether betting likelihood should beryllium offered connected nan different action, according to nan sources pinch knowledge of nan situation. The NBA powerfully advised against it because nan tournaments had been tape-delayed, meaning a fistful of group already knew nan outcomes and could use from that accusation if bets were offered. Sportsbooks agreed.
The NFL precocious has besides recovered occurrence restricting definite types of prop bets, this clip done legislation. The Illinois Gaming Board successful February approved nan NFL’s request to prohibit 10 types of what it classified arsenic “objectionable wagers,” including whether a kicker would miss a section extremity aliases an other constituent and whether quarterback’s first walk of a crippled would beryllium incomplete — nan aforesaid type of “single-actor” bets that leagues person travel retired against and that person reportedly sparked investigations into aggregate athletes.
By seeking to power which bets are offered, leagues and their gambling partners are attempting a delicate equilibrium of limiting bets they see risks to nan integrity of their games while still ensuring that capable betting options are offered to support fans wagering their dollars successful ineligible markets, alternatively than done offshore sportsbooks wherever search suspicious activity is overmuch much opaque.
Proponents of sports betting propose that though nan headlines astir players aliases convention staffers being investigated, aliases caught, for betting manipulation isn’t bully nationalist relations for nan sports, they’re a motion that a “complex strategy that detects aberrational behavior,” arsenic Silver said successful July, is moving arsenic intended. As portion of their business agreements, leagues, betting operators and alleged integrity firms person data-sharing agreements that let them to pass pinch 1 different to show suspicious activity.
"The transparency inherent pinch legalized sports betting has go a important plus successful protecting nan integrity of diversion competition," DraftKings said successful a statement. "Unlike nan pre-legalization era, erstwhile threats were acold much difficult to detect, nan regulated manufacture now provides accrued oversight and accountability that helps to place perchance suspicious activity.”

In nan lawsuit of nan brace of Cleveland Guardian pitchers, nan Ohio Casino Control Commission was notified June 30 by a licensed Ohio sportsbook astir suspicious wagering connected Guardians games and “was besides promptly contacted by Major League Baseball regarding nan events,” a committee spokesperson said successful a statement. “Under nan Commission’s statutory responsibilities, an independent investigation commenced.”
It's why leagues and sportsbook operators see restricting bets a good line.
“If you person sweeping prohibitions connected that type of a bet, you’re taking distant nan expertise for your convention to guarantee nan integrity of that activity,” said Joe Maloney, a elder vice president for strategical communications astatine nan American Gaming Association. “You will not person nan expertise to activity pinch an integrity show to place immoderate irregular betting activity connected specified a ineligible market. You will not person nan collaboration of a ineligible usability who will stock that information. You will not person nan collaboration of a ineligible usability to opportunity to them, ‘Here’s nan do-not-fly database for betting activity for our league: employees, nine employees, trainers, diversion officials, referees,’ etc. ...
“Betting engagement connected prop bets is mostly a reflection of fandom. And so, by pushing that away, I deliberation you perfectly suffer nan expertise to decently oversee it and to guidelines retired nan bad actors that would look to utilization it. Because it will still return place.”
In 2022, ineligible sports betting accounted for $6.8 cardinal successful ineligible revenue, while forbidden sports betting accounted for astir $3.8 billion, according to investigation from nan American Gaming Association, a waste and acquisition association. Last year, it estimated that gross from ineligible sports betting roseate to $16 billion, while nan forbidden marketplace grew to astir $5 billion.
A 2024 study by nan International Betting Integrity Association, a nonprofit integrity patient made up of licensed gambling operators, questioned nan efficacy of restricting prop bets. The IBIA reported that 59 retired of 360,000 hoops games that had been offered for betting from 2017 to 2023 were “the taxable of suspicious betting.”
“There was nary suspicious betting activity linked to lucifer manipulation identified connected subordinate prop markets,” nan IBIA study said. “There is nary meaningful integrity use from excluding specified markets, which are wide disposable globally. Prohibiting those products will make offshore operators much attractive.”
By persuading its partners to support immoderate prop bets disconnected nan books, nan NBA nevertheless provided a precedent for really to region bets leagues person considered, to usage Manfred’s term, “unnecessary.” Would MLB, amid an ongoing investigation into 2 pitchers, follow? Unlike nan NBA, MLB doesn't person easy defined classifications of contracts specified arsenic 10-day and two-way players. One method could alternatively beryllium to target alleged first-pitch microbets. MLB is having “ongoing conversations” related to gambling, according to a personification pinch knowledge of nan league’s thinking.
If shot were to make specified a push against microbets, its reasoning mightiness reflector nan NBA’s past year, said Gill Alexander, a longtime sports betting commentator for VSiN. “I deliberation fundamentally baseball’s constituent would be, you know, this is nan type of prop that is conscionable begging for trouble, right?” Alexander said.
Ohio, for one, would astir apt agree. Last month, Gov. Mike DeWine asked nan Ohio Casino Control Commission to ban prop bets connected “highly circumstantial events wrong games that are wholly controlled by 1 player," he said successful a news release, while asking nan NFL, MLB, NBA, NHL, WNBA and MLS commissioners to support his stance.
“The prop betting research successful this state has grounded badly,” DeWine said.
Alexander said: “I do deliberation that we’re successful nan era now wherever these leagues tin exert immoderate power connected these sports books, arsenic agelong arsenic it is of nary financial symptom to nan sports books. This is 1 of these instances where, really, I don’t work together pinch Rob Manfred each day, but I really deliberation he’s astir apt going to get what he wants here.”

Andrew Greif
Andrew Greif is simply a sports newsman for NBC News Digital.