After the pitcher releases the ball, push the d-pad UP to make the ball go slower.
Batters find slow balls easy to hit, but they are also easy for the infielders to catch.
Out To fake out your oppenet when pitching, use up or down on the d-pad to move the umpire left or right. Then pitch to the oppisite side you've placed the umpire at. This will pitch the ball right on the corner and the computer will not be able to hit it. Use this for only four innings with a single pitcher. The computer will catch on.