noun
batted ball that hits the batter
Baseball term for a batted ball that strikes the batter, resulting in a dead ball and the batter being awarded first base.
自打球が足に当たって、彼はしばらく痛がっていた。
The batted ball hit his foot, and he was in pain for a while.
自打球で出塁した。
He got on base after being hit by his own batted ball.
A foul tip is a batted ball that goes sharp and direct to the catcher's glove and is caught; a 自打球 is a batted ball that hits the batter, regardless of whether it is caught.
Compound of 自 (self) + 打 (hit) + 球 (ball), literally 'self-hit ball'.