From MLB Power Pros Wiki

Effect

Are we sure about the power boost? The feeling I get from playing the game is that Pull hitter only affects the tendency of the direction the ball is hit - as in a later timing still results in pulling the ball. In that sense it's nothing like the opposite of Push Hitter. --Odawali 16:50, 14 March 2008 (CDT)

I usually don't use guys with Pull Hitter, but because it's red/blue - I think that the red part restricts ability to go the other way, and late-timed pull hits won't be good ones - but the blue parts make usual pull hits (early ones with guys without the ability) more powerful. Just a hunch, but it's realistic.--J-Gao 17:11, 14 March 2008 (CDT)