21. Alex Rodriguez
Whether it was using steroids or joining the Evil Empire, A-Rod's used all avenues to get ahead in the MLB. But for the purposes of this list, we're focusing on his bush-league play on the field. Prominent examples are his batty-man swipe on Bronson Arroyo in the 2004 ALCS and his shout at a Blue Jays third baseman while rounding the bases, causing him to drop a pop fly. Soundtrack please!