He won his first overall 450 Class motocross victory on July 4 , 2009 at the Buchanan , Mich. round of the series .
Grant then podiumed at the opening round of the AMA Motocross Series .
Grant won Grant 's first overall 450 Class motocross victory on July 4 , 2009 at the Buchanan , Mich. round of the series .
Grant then podiumed at the opening round of the AMA Motocross Series .