When playing as the Yankees in exhibition mode, put Paul O'Neill or Bernie Williams in your line up (they should all ready be there). Then whenever they come up move them all the way left in the batters box (no where else) and they should 95% hit a home run, a long fly ball, or a hit. This should work with other players of other teams with their batting staces. Remember this only works 95% of the time when your lefty.