There has been some confusion with regard to Substitutions - please review the below to familiarize yourself with USA’s rules:
i) SUBSTITUTIONS:
1. Procedure: Players may be substituted only during a stoppage of the game, and then, only with the consent of the referee. The number of substitutions shall be unlimited and may be made at the following times:
a. Prior to a throw-in in your favor.
b. Prior to a goal kick by either team.
c. After a goal has been scored by either team.
d. After an injury by either team, when the referee has stopped play.
e. Between periods.
f. Following a game stoppage for a CAUTION, the player cautioned may be substituted with the consent of the referee.
2. Substituted Player: A player who has been removed by substitution may re-enter the game.
3. Red Card: No substitute is allowed for any player EJECTED (Red Carded) by the referee.