450 SX riders had to dodge a downed rider in the opening lap in St. Louis, an incident which allowed one rider to claim the early lead and eventual win.
St. Louis marked the final 250 SX East race before a month-long break before the series returns in New Jersey. A frenzied first lap saw one rider claim the lead and then run away with the win.
Riders sound off before Round 13 of the 2015 Monster Energy Supercross Championship in St. Louis.
Trey Canard underwent surgery to repair the radius in his left arm that was fractured during the 2015 Monster Energy Supercross Championship stop in Detroit.