Temecula rider Seth Hammaker obtained his first career AMA Supercross main event victory Saturday, March 13, at AT&T Stadium in Arlington, Texas. Hammaker led all 21 laps of the 250SX class main event and had a time of 15 minutes, 51.911 seconds. He also won his heat race, and Menifee’s Justin Cooper was the first finisher in the other heat race. In the first qualifying session, Cooper had the fast lap of 45.652 seconds, Georgia’s Jordon Smith qualified second with a 45.834-second lap, Cameron McAdoo of Iowa had a lap of 45.929 seconds for third, Florida’s Hunter Lawrence was fourth at 45.930 seconds and Hammaker was the fifth qualifier with a lap of 46.121 seconds. Cooper was also the second session’s fast qualifier with a lap of 45.299 seconds, Hammaker’s fast lap of 45.