pitchers: contrary to belief long distance is not the answer, it dulls fast twitch fibers... try doing a sprint series for cardio instead
third basemen: while fielding a grounder focus on securing the ball, the ball gets there fast and you will have plenty of time to maketheout
first basemen while holding on a runner cause a distraction, shuffling your feet, hitting your glove, its harder for the runner to focus
in the cages work on situations, line drives, and directional hitting to better yourself for gametime
for every inch your head tilts to either side while pitching = 2 inches in tilt on your release point
conditioning: legs abbs, and back are the most important muscle for baseball.. biceps are not used in anyway during any activity in baseball