A walk-off touchdown is a touchdown scored in gridiron football that ends the game with the winning team being either behind or tied in points at the beginning of the play.[1][2]
This is considered[by whom?] the most spectacular and rare play during regulation time happening in the 4th quarter.[citation needed] The play clock must say :00 at the end of the play in the 4th quarter. A walk-off touchdown is much more common during overtime play because of the overtime rules in effect.[3][4][5][6][7][8]
Former quarterback Tim Couch has the most walk-off touchdowns from throwing Hail Marys in the NFL with two.[9][10]