He moved to Multimatic Motorsports in 2012, where he shared the No. 71 Aston Martin Vantage with Tonis Kasemets en route to an 11th-place GS finish. The following year, he partnered with Scott Maxwell in Multimatic's No. 55, during which Buford recorded a series-record seven pole positions. The two remained together for 2014.[2] Buford's co-driver in 2015 was 16-year-old Austin Cindric, who described Buford as "someone to lean on" during the early stages of his racing career.[5] The duo recorded a victory at Canadian Tire Motorsport Park.[6]
Buford began competing in the Pirelli World Challenge's GTS class in 2016 with Racers Edge. He swept the Barber Motorsports Park weekend from the pole,[7][8] followed by a third win at Lime Rock Park after wrecks took out the leaders and a cleanup truck interfered with another.[9]
He ran two Sports Car Challenge races in 2017 with Multimatic. Buford also returned to the Pirelli World Challenge, running in the GTS Pro class with Racers Edge, and won both races at Mosport.[10]
Buford joined PF Racing for the 2018 PWC season. In the GTS SprintX race at Circuit of the Americas, he scored the Mustang GT4's maiden victory when he and Maxwell passed pole sitter Harry Gottsacker during pit stops; Buford explained "some of the cars have outright pace on us, but we just executed the perfect race."[11] Buford recorded a second win that year at Watkins Glen International after beating Ian James to the finish by .208 seconds.[12]
In 2019, Buford ran the full Michelin Pilot Challenge schedule with PF Racing, finishing 11th in the standings.[13] He also began racing in the British GT Championship's Silver Cup for Multimatic alongside fellow American Chad McCumbee.[14]
In 2021, Buford joined the newly-formed Big Machine Racing in the No. 48 Chevrolet for the full Xfinity season.[18] His first race with the team came in the second round on the Daytona road course as he was not approved for the season opener on the oval.[19] He went on to finish 23rd in the final points standings after recording sixteen top-twenty finishes with a best result of ninth at Michigan International Speedway. It was also during this year that Buford made select starts in the ARCA Menards Series and ARCA Menards Series East for Fast Track Racing, making his East series debut at Dover International Speedway, where he finished in ninth, and his main series debut at Pocono Raceway where he finished in eighth place.
In 2023, it was announced that Buford would run a second car for Big Machine Racing at Daytona International Speedway, the No. 5 Chevrolet.[23] After qualifying for the race in twelfth, he went on to finish in 25th place. It was later announced that Buford would run the No. 5 at Talladega Superspeedway, where he qualified in fifth but finished in 36th after being involved in a multi-car crash early in the race.[24]
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