An official who patrols the boundary line, indicating when it has fully crossed the line, and who then executes a boundary throw-in to return the ball to play. There are typically two of these umpires per game, one on each side of the oval, but there will be four in top grade games.

边线裁判

在场边巡逻比赛执法官员，负责判定球是否出界，以及在判罚场外掷球时将球掷回场内。通常一场比赛需要两名边线裁判，但是在顶级联赛中边线裁判的人数会增加到4人。