With its split seasons—AMA Supercross followed by AMA Pro Motocross—the U.S. circuit is unique in the racing world. Every May, as supercross ends and outdoor motocross revs up, everyone gets a second chance to contend for a championship. In fact, in the premier 450 Class, not since the last full year of Ryan Dungey’s ever-steady career has anyone managed to win both the indoor and outdoor titles in the same season.