Jacob, a really good baseball pitcher, started playing in a new league called Triple-A.
He didn't do so well in his first game, but that's okay because even other great players didn't do well in their first game.
The team is helping Jacob learn how to be a really good pitcher by slowly getting him used to playing in the big leagues.
They want him to be strong and healthy, so they're making sure he doesn't throw too many balls right now.
