Your performance goals are much more about speed instead of just strength. The bouncer power needs a heavy foundation and quite a bit of power.
As for jumping and throwing, as TrainForPain said, you need to do those activities with much dedication and commitment. Do jumps on dry land to mimic the jump out of the pool. If you can get hold of a pitchers weight program, I would follow it. For jumping maybe jump squats, but IMO these can be dangerous when your form falters.
When in the weight room concentrate on speed movements. The Olympic lifts are where I would concentrate. Those are “power” in true meaning of power (Ft-Lbs per second). That is, moving as much weight as you can as fast as you can. Obviously you must be focusing on overhead movements. Become good at both Olympic lifts.