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19. Baseball rules

Smarkets general betting rules (1-11) will apply unless superseded by the Terms and Conditions or sports specific betting rules.

19.1   General

19.1.1   All bets will be voided on all markets unless both named pitchers start in the first innings for their respective teams.

19.1.2   A pitcher is deemed to start once he has thrown a single pitch to the opposing team's first batter, in the first innings.

19.2   MLB specific rules

19.2.1   Bets will be settled as their outcomes become determined. Later decisions to void markets will not affect earlier settled markets if the outcomes of which are unaffected.

19.2.2   Matches must begin within 36 hours of the initially scheduled start time, or be voided. If a match begins but is later abandoned or postponed an official result must be declared within 36 hours for outstanding bets that have not yet been unconditionally determined to be valid.

19.2.3   Extra innings will be included unless stated otherwise.

19.2.4   At least nine innings (or 8.5 innings if the home team is ahead) must be completed for bets on ‘Total runs’ or ‘Run line’ markets to be valid.

19.2.5   If a game is abandoned all bets placed on winner markets will be voided:

  • If the game is not replayed within 36 hours of the original start time
  • Or unless five innings have been played (or 4.5 innings if the home team is ahead).

An official result must still be declared in either of the above cases in order for bets on the winner market to be settled.

Last modified: August 9, 2019


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