In a match of AFL, each team has 18 players on the field, with another 4 on the bench, who can be subbed on at any time. There are 3 main positions, which are forward, back and midfield. There are normally 6 forwards, 6 backs and the rest midfielders. The main role of a forward is to get the ball within the 50m arch, and kick goals. The main role of a midfielder is to run the ball, and to produce most of the play. The main role of a back is to defend, and to try and stop the oppositions forwards from scoring. Within these 3 main positions, there are a few other positions also, these are: full back, back pocket, centre half back, midfield, centre half forward, half forward flank, full forward, forward pocket, followers and taggers. Most of them come under the 3 main positions, but two of them have there own different roles. In the 'followers' we have the ruck man, who are in any ball toss, and they are called followers because instead of having an area on the field, they follow the play everywhere. The tagger of any teams role is too do only one thing; stick with their given opponent. Usually their given opponent is the other teams best player. Although each player has their own position, all players can go anywhere on the field.