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Free substitution or rolling substitution is a rule in some sports that allows players to enter and leave the game for other players many times during the course of a game, generally during a time-out or other break in live play; and for coaches to bring in and take out players an unlimited number of times.
The assistant referee indicating a substitution Fourth official notifying the referee of the details of the substitution. Substitutions are governed under Law 3 of the Laws of the Game in the (3) Substitution Procedure section. [21] A player can only be substituted during a stoppage in play and with the permission of the referee. The player to ...
The two-platoon system is a tactic in American football enabled by rules allowing unlimited substitution adopted during the 1940s. The "two platoons", offense and defense, are an integral part of the game today.
The sport of arena football used a limited one-platoon system (from which quarterbacks, kickers and one "specialist" were exempt) from its inception until 2007. The 2024 revival of the Arena Football League reintroduced the system in its inaugural season but abandoned it after three weeks.
At higher levels of rugby, some games have appointed substitution controllers (sometimes called the "fourth official" and "fifth official"). These officials liaise with the teams and ensure they only use their permitted number of substitutions. They also indicate to the referee when a substitute is ready to come on.
Editor's note: The University of Georgia announced that Kirby Smart's father, Sonny Smart, died early Saturday morning. By almost any measurement, Georgia's Kirby Smart is one of the best coaches ...
A platoon system in baseball or American football is a method for substituting players in groups (platoons), to keep complementary players together during playing time.. In baseball, it is usually used to optimize batting performance against pitchers of opposite handedness.
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