Fifteen players make up a team in both football and hurling.
Although a game can be started with 13 players on either side, both teams are expected to have a full compliment by the time the second half starts.
Five substitutions are permitted during the game and should the game go to extra-time, a further three replacements are allowed.
If a team has a player sent-off during the game, they may be replaced in extra-time, allowing them to start the added period with 15 players.
Like rugby, temporary substitutions are allowed for players who sustain cuts during a game.