GLENDALE, Ariz. (January 28, 2017) - In front of a crowd of 54,274 fans inside University of Phoenix Stadium, Monster Energy Supercross made its first trip outside the state of California on Saturday night for the fourth round of the 2017 season. Following an uncharacteristically slow start to the season, Monster Energy Kawasaki's Eli Tomac was dominant in the 450SX Class Main Event, grabbing his first victory of the season with a wire-to-wire effort. In the Western Regional 250SX Class, Monster Energy/Pro Circuit/Kawasaki's Justin Hill made it back-to-back wins following a late-race pass on championship leader Shane McElrath.