Video: AMA highlights final round

The 250 Class championship battle between Jeremy Martin and Marvin Musquin took center stage at Ironman Raceway as the 2015 Lucas Oil Pro Motocross Championship drew to a close. The final round of the season delivered several twists though, including a devastating turn of events for one title hopeful and a rookie earning his first career win. Also: Ken Roczen tries to snap Ryan Dungey’s winning streak in the 450 Class, and legends of motocross return to the track for a special race.