Nothing fuels the fire of a rivalry more than a player switching sides. In every great rivalry, key players have gone from heroes to villains. For example, Johnny Damon from the Red Sox to the Yankees, Dennis Rodman from the Pistons to the Bulls, Brett Favre from the Packers to the Vikings. The California Clasico has now seen 25 players sport a jersey from both sides.
Landon Donovan began his storied MLS career in San Jose with Quakes at the age of 19. He played three seasons in black and blue and led the Quakes to two MLS Cups.