Hi!
Both of our guys went through periods when they didn't love baseball, but we never pushed them to step it up...only to keep their committments.
Our oldest always pooped out around July in high school. Three to four games a week in the summer wore him out. In college, the grind of summer leagues away from home was tough. In the minors, playing every night got old around August. In MLB, sporadic play wore on him mentally. Injuries, surguries, rehab took their toll at times, too.
At every level, stress can get to them from time to time. If they have the desire to continue, they'll gut it out. If they feel its time to move in a different direction, they'll hang up the cleats. Either way, they'll be fine if they know we love them more than baseball.