He has more than 100 victories in local, regional and national World Karting Association Dirt Series events, all which he accomplished in the five-year span from 1995 to 2000.

In 2003, he started late model racing at Myrtle Beach Speedway, and became the youngest rookie winner at the track.

[3] McCumbee made his ARCA RE/MAX Series in 2004 at Michigan International Speedway for Hillenburg, but flipped the #10 Fast Track Driving School Chevy in spectacular fashion after 21 laps and finished 37th.

After failing to qualify for the season opening event at Daytona International Speedway, he had two consecutive top-fifteen finishes before MRD closed, moving him to the No.

[5] On 14 August he left Green Light Racing,[6] and on the 20th announced he would drive for MRD Motorsports replacing Blake Bjorklund with The GPS Store and Garmin coming with him to sponsor the No.

[7] McCumbee took the truck to a near upset victory at Texas before spinning his tires on a restart which led to being wrecked while leading with two laps to go and he finished 13th.

[9] Goody's Cool Orange Headache Powders sponsored the car, and McCumbee finished 25th in that race.

He also won his first two ARCA races, at Nashville Superspeedway and Pocono Raceway respectively, driving for Andy Belmont.

45 entry with Marathon American Spirit Motor Oil sponsoring, making a total of six starts but failing to qualify on three occasions.

For the 2009 Camping World Truck Series season, McCumbee rejoined SS-Green Light Racing to be driver of the No.

In April 2010, McCumbee made his NASCAR Nationwide Series debut at Texas Motor Speedway.

Also in April, it was announced that McCumbee had signed with Andy Belmont to run the remainder of the 2010 ARCA Remax Series season in the No.1 Ford.