A runner is a player who runs in order to score runs because one of the batsmen on the field is injured and can not run; that batsman will bat, while the runner is treated as doing the running for the batsman. Both the runner and the injured batsman can be run out; that is, if one of the pair is in a batsman's ground but the other is not, then running out the unsafe player is treated as running out both players. Runners have been banned in international cricket since 2011.