Baseball betting takes a lot of work. To be a good MLB bettor, you must account for a team’s chances given their batting order, starting pitcher, the game’s weather and the talent of their opponent. Then you must shop for the best odds to find positive expected value bets. Unforeseen circumstances like rain can cause delays or postponements. Those situations may leave new bettors wondering what happens to their MLB bets if a game is suspended or postponed.
MLB Betting: What Happens When a Game is Suspended or Postponed?

MLB Betting: What Happens When a Game is Suspended or Postponed?
There isn’t one clear answer on what happens to an MLB bet when a game is suspended. A lot depends on the scenario. The most common reason that baseball games get cut short is the weather. When there is too much rain or the forecast calls for a wet day or evening, teams must consider if a game should even get underway.
In the event that a game is postponed to another date before it begins, all bets are voided. The wager will return to your account.
However, sometimes rain starts early in the game but before it goes five innings and becomes official. In that case, a bet will also be voided and returned except for a few special circumstances. Moneylines require a game to go a full five innings. Totals, prop bets and other wagers that require a full game to play out are usually voided.
Sometimes sportsbooks do count overs or inning bets since those can hit before the postponement happens. Make sure to check the house rules before placing your bets to confirm this. For example, BetMGM and FanDuel honor these bets because they have been “unequivocally determined; DraftKings does not.

Suspended games are a bit different from pre-game or in-game postponements. The assumption with a game suspension is that it will be played in full at a later time, usually the next day.
Sportsbooks have different rules on suspended games just like they do for postponements. Some books may keep the bet active if the game is going to be resumed within 24 to 36 hours. For example, DraftKings uses the 36-hour standard. Others require the game to be played later in the same day. Again, be sure to check with the outlet where you made the wager to get a specific answer for how they grade MLB bets when a game is suspended.