It was signed by Babe Ruth.
3 seconds sound clip from the The Sandlot (1993) movie soundboard.
You can hear this line at 01:30:52 in the Blu-ray version of the movie.
Quote context
[...]
- We'll talk about this baseball.
- Come on.
- You in trouble, aren't you, son?
- Yeah, well, uh, that was my stepdad's ball.
- I take it back. You're not in trouble. You're dead where you stand.
[...]