What does it really mean to "sit on a pitch?"
To me, it means the hitter is guessing what the pitcher is going to throw, and how he is trying to get the hitter out....there are many ways to get hitters out (they're not a smart bunch)
. Depending on the count, level (high school, college, majors), and the situation will the hitter try to figure out what the pitcher is likely to throw. Colleges, minor league and major league has the advantage of advanced scouting reports, stats and video to help with that guess work. As a hitter, you've got to understand your match up with the pitcher, and what you are good at. The pitcher is doing the same thing by analyzing the hitters previous at bats and swings. This match up is what makes baseball exciting for me especially in tight situations.
Many times hitters guess wrong, and you get some funny swings. Of course good pitchers have multiple pitches they can throw for a strike in any count in any situation....those are the ones you don't want to be facing especially if you can't catch up to their fastball....you've become easy pickins'.