1972 marked the inaugural year for the AMA Motocross National Championship.
Brad Lackey dominated the 500cc class ahead of
Gary Jones and Wyman Priddy.[1] In 1972, after the season-ending 500cc race on September 2, American riders competing for the AMA national championship continued to accumulate points counting towards the national championship while they competed in the
1972 Trans-AMA motocross series which began on October 1 and hosted visiting European riders from the
Motocross World Championship.[2]
Jones claimed the 250cc championship ahead of his Yamaha teammate,
Jimmy Weinert.[3]