Each team consists of one goalkeeper (who wears a different colour jersey), six backs, two midfielders, and six forwards: 15 players in all.
The role of a goalkeeper, who wears the number 1 jersey in Gaelic games, is similar to other codes: to prevent the ball from entering the goal.
The goalkeeper in Gaelic football and hurling also usually has the role of kicking or pucking the ball out to the outfield players.
In Gaelic football a keeper's shot stopping ability is of great importance alongside blocking.
There is no limit to where on the field the goalkeeper can travel, although once they are outside the penalty area, they are subject to the same rules as all other players.
A goalkeeper in men's football may touch the ball on the ground within his own small parallelogram, and is the only player permitted to do so.It is not permitted to physically challenge a goalkeeper while inside his own small parallelogram, but players may harass him into playing a bad pass, or block an attempted pass.
The position of the full-back requires that the player have decent speed over short bursts, strength, and good hand eye co-ordination.
The required agilities of a centre half-back are strength, height, speed and a good catching game.
The role of the centre -forward who wears the number 11 jersey, is to build up attacks and feed the ball to the full-forward line.
The role of the left and right corner-forwards, who wear the number 13 and 15 jerseys respectively, is to watch the full-forward's breaks and to score points and goals.
It is common for teams to employ a tall full-forward to pluck high balls from the sky and to challenge the size and strength of the full-back.