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Malcolm Stewart is an American Professional Supercross lites racer. He is the younger brother of James "Bubba" Stewart, who is a successful supercross and motocross racer. Malcolm made his professional debut on February 12, 2011 at the Houston Supercross held in the Reliant Stadium, which is a venue in the AMA Supercross Championship series. For the 2011 Season, Malcolm, will be riding for team ARMA-Suzuki City-Nitro Circus in the Lites Eastern Region riding the number 139 Suzuki. For the 2012 Season, Malcolm moved to the JDR J-Star KTM for the Lites Eastern Region and changed the bike number to 37. For the 2013 Season after an unsuccessful finish for the Eastern Region, Malcolm moved to the 250cc West and changed the bike number to 32. In 2013 Malcolm was signed to Troy Lee Designs Honda as a fill in replacement for the injured tld rider Christian Craig and moves up to the 450 class competing with his big brother James.