He currently drives the #07/#08 Chevrolet Silverado for Green Light Racing in the NASCAR Craftsman Truck Series, and the #11 for Andy Hillenburg in the ARCA RE/MAX Series. He finished fourth in the RE/MAX Series point standings in 2005, his first full year of competion. He is also known for his portrayal of Dale Earnhardt, Jr. in 3: The Dale Earnhardt Story. He drove the #45 Petty Enterprises Dodge in the [[Sprint Cup Series]] while Kyle Petty did broadcasting in 2007
In seven starts in 2006, McCumbee's best finish is a ninth at Texas Motor Speedway. He is a contender for the Truck Series' Rookie of the Year award. He also works as an instructor at the Fast Track Driving School.