Substitution

Substitution (or interchange) is replacing one player with another during a match. Substitute players that are not in the starting lineup (also known as bench players, backups, interchange, or reserves) reside on the bench and are available to substitute for a starter. Later in the match, that substitute may be substituted for by another substitute or by a starter who is currently on the bench. In soccer, substitution is permitted only during stoppages of play, and a player who has been substituted out of a game usually cannot re-enter it.