You'd be better off performing for power as oppose to strength if sports performance is your primary goal.
You want your shoulders and hips to perform at a high velocity. Quantity of weight that you can move is not quite as necessary as power, this is especially true in baseball. Develop some base strength, then employ that strength over power movements. Big curls and a big bench won't do anything for you. Swings and pitches are all derived from hips and shoulder velocity.