Image The Yamalube Star Racing Yamaha duo of Mitchell Harrison and Alex Martin led early in the second 250 heat race. Credit GuyB Related: Alex Martin Zach Osborne Mitchell Harrison Supercross Supercross 2016 Photo Blast Santa Clara Use keyboard arrow keys to browse the gallery. Swipe to browse the gallery. Prev Next 4 of 42Autoplay Autoplay SlowMedFast Share to Facebook Facebook Facebook Share to Twitter Twitter Twitter GuyB 4/4/2016 3:29pm Share to Facebook Facebook Facebook Share to Twitter Twitter Twitter