A rugby league football team consists of thirteen players on the field, with four substitutes on the bench. Players are divided into two general categories, forwards and backs.
Forwards are generally chosen for their size and strength. They are expected to run with the ball, to attack, and to make tackles. Forwards are required to improve the team's field position thus creating space and time for the backs. Backs are usually smaller and faster, though a big, fast player can be of advantage in the backs. Their roles require speed and ball-playing skills, rather than just strength, to take advantage of the field position gained by the forwards.
==Names and numbering==
The laws of the game recognise standardised numbering of positions. The starting side normally wear the numbers corresponding to their positions, only changing in the case of substitutions and position shifts during the game. In some competitions, such as Super League, players receive a squad number to use all season, no matter what positions they play in.
The positions and the numbers are defined by the game's laws as:〔
* 1 Fullback
* 2 Right Wing
* 3 Right Centre
* 4 Left Centre
* 5 Left Wing
* 6 Stand Off / Five-eighth
* 7 Scrum Half / Half back
* 8 Prop
* 9 Hooker
* 10 Prop
* 11 Second Row
* 12 Second Row
* 13 Loose Forward / Lock forward
The chart below shows these numbers along with the names ''most commonly used'' for their positions. The chart shows a typical formation during a scrum. Forwards are above the line and backs below.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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