When trailing (or winning) and you hit a ball into the ground or fly out, pause game play and enter the "Controller Select" screen, Then, choose the other team and make them throw the ball to the wrong base or miss the fly ball.
Activate the following cheats by entering the corresponding codes:
CHEAT FUNCTION - CHEAT CODE Sliver Era and Golden Era teams - Press RIGHT, UP, RIGHT, DOWN, DOWN, LEFT, UP, DOWN at the main menu. Classic free agents - Press LEFT, RIGHT, UP, LEFT, RIGHT, UP, RIGHT, DOWN at the main menu to unlock classic free agents at the "Player Movement" menu. Big baseball - Press Start to pause game play, the press RIGHT, DOWN, UP, LEFT, RIGHT, LEFT, DOWN, UP. Big heads - Press Start to pause game play, the press RIGHT, LEFT, DOWN, UP, LEFT, UP, DOWN, LEFT. Small heads - Press Start to pause game play, the press LEFT, RIGHT, DOWN, UP, RIGHT, LEFT ,DOWN, LEFT.