Bayne began his racing career racing go-karts at the age of five. After eight years, he moved to Allison Legacy Race Series, where he became the youngest top rookie. Two years later, he moved to the USAR Hooters Pro Cup Series Southern Division. In 2008, he signed a contract with Dale Earnhardt, Inc. to race in the NASCAR Camping World East Series, where he recorded one win, six top-five, and seven top-10 finishes. One year later, he recorded Sunoco Rookie of the Race honors after participating in the Toyota All-Star Showdown at Irwindale Speedway. Also in 2009, he began racing in the Nationwide Series for Michael Waltrip Racing. After about two years with the team, he moved to Roush Fenway Racing, at the late end of the season, and began racing in the Sprint Cup Series for Wood Brothers Racing. In 2011, Bayne won the Daytona 500, becoming the youngest driver to win the race at 20 years and 1 day.