(February 12, 2010) - For the first time in two decades, Monster Energy AMA Supercross, an FIM World Championship, has seen four winners through the first five rounds of the season. Not since 1990 has there been so much parity in the premier AMA Supercross class and coming into tomorrow night's final race from Southern California at Anaheim's Angel Stadium, the championship battle is heating up between Ryan Dungey, Josh Hill and Ryan Villopoto.