fumble

A fumble in gridiron football occurs when a player who has possession and control of the ball loses it before being downed (tackled), scoring, or going out of bounds. By rule, it is any act other than passing, kicking, punting, or successful handing that results in loss of ball possession by a player. Unlike other events which cause the ball to become loose, such as an incomplete pass, a fumbled ball is considered a live ball, and may be recovered and advanced by any member of either team.