It has happened a few times. If not a win, the hail mary sent them to OT where they did win (I think Bears vs Browns or Bengals, one of the Ohio teams, in 2000 when the QB Shane Matthews chucked the ball like 40-60 yards into the endzone where there were a crowd of players ready to play jump ball, and the Bears got it in the end.) But it wasn't a big game, so nevermind.