noun
walk-off hit; game-ending base hit in the 9th inning
Baseball term for a hit that scores the winning run in the bottom of the 9th inning or later, ending the game.
彼はサヨナラ安打を打ってチームを勝利に導いた。
He hit a walk-off hit and led his team to victory.
9回裏、サヨナラ安打で試合が決まった。
In the bottom of the 9th, the game was decided by a walk-off hit.