Huh? Umm, it depends on what your goals are. Generally, going into the season, you'll want to train for strength, explosiveness. Baseball is a power sport, so you'll want to train that way.
If it's the beginning of the offseason, and your goals are to gain weight, then you'll probably focus on performing high reps. But this isn't always the case, it depends on how your body responds to different training techniques.
Can you further clarify on what your goals are?