The Blood rule is a rule used in many sports that states that an athlete that receives an open wound, is bleeding, or who has blood on them or their clothes, must immediately leave the playing area to receive medical attention. Though they may be able to play again later, they cannot go back and play again until the wound is taken care of, bleeding has stopped, and all contaminated equipment has been replaced.
Though there are two options that can be chosen: the first option is that the player be substituted and play resumes, or the official can halt play until the player has returned, the former being the most commonly chosen. In the National Rugby League, the latter option is first employed; play stops whilst the player's medical staff attends to the wound. If the bleeding is not stanched to the referee's satisfaction, the player must then leave the field for further attention.
If a player refuses to leave even though an official requests they do so this occurs, the official will stop play, and if the player continues to stay after play has ceased, the official will enforce the rules for accompanying league, which may include forfeiture of the game.
Some sports where this is used are Australian Rules Football, NCAA Baseball, and many major American sports leagues like the National Hockey League, National Basketball Association, and Major League Soccer.
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- "Frequently Asked Questions about Australian Rules Football". Footy.com.au. Retrieved 2007-07-02.
- "2004 Baseball Rules Changes and Points of Emphasis" (PDF). NCAA. Retrieved 2007-07-02.