High School team matches consist of five active players on each team with player substitutions during timed rounds.
Timeouts and player substitution during timeouts are allowed.
During a match of two or three games, three player substitutions are allowed.
The first is referred to as "last change", where during stoppages of play, the home team is allowed to make player substitutions after the visiting team does.
Matches are commonly played in sets of 6 to 20 deals, with scoring required and player substitutions permitted between sets.
In baseball, the double switch is a type of player substitution, usually performed by a team while playing defense.
Given the burdens of performance and rehearsals schedules, player substitutions are not that easy to avoid.
In 1889, the first bullpen appearance occurred after rules were changed to allow a player substitution at any time.
Camrose matches comprise two sets of 16 deals with player substitutions permitted between sets.
It was the result of rules that limited player substitutions, rules that are also standard procedure in many other sports, but were eliminated in the 1940s.