Garrett Smithley (born April 27, 1992) is an American professional driver. He currently competes full-time in the NASCAR Xfinity Series, driving the No. 0 Chevrolet Camaro for JD Motorsports, and part-time in the Camping World Truck Series, driving the No. 63 Chevrolet Silverado for MB Motorsports. Smithley has also competed in the ARCA Racing Series.

Smithley began his racing career in 2007 in Bandolero cars at Atlanta Motor Speedway, and Lanier National Speedway, and won the rookie of the year in 2008.

Smithley made his Xfinity Series debut in the final race of 2015, at Homestead driving the No. 70 Chevrolet Camaro for Derrike Cope Racing, started 34th, and finished 28th.

In February 16, 2016, it was announced that Smithley would race for JD Motorsports, driving the No. 0 Chevrolet Camaro, and would also compete for the NASCAR Rookie of the Year honors. He ran every race except the PowerShares QQQ 300. Finishing 18th in series points, he finished in the top 15 in both restrictor plate races, including one at Talladega Superspeedway. Smithley cracked the top 20 five times outside of plate tracks, but troubles at road courses put a slight damper on his season.

Smithley made his Truck series debut at his home track, Atlanta Motor Speedway, driving the No. 63 Chevrolet Silverado for MB Motorsports. He made three more starts in the 2015 season, scoring a high finish of 14th at Michigan. He returned to Atlanta with MB Motorsports for his first start of 2016, finishing 18th.

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