Greg Sacks (born November 3, 1952, in Mattituck, Long Island, New York) is a former NASCAR driver. He is married and has three children. He lives in Ormond Beach, Florida. He and his sons are partners in Grand Touring Vodka.

Sacks has spent most of his career as a research and development (R&D) driver for many NASCAR teams. He won the 1985 Firecracker 400 at Daytona International Speedway acting as an R&D driver for DiGard Motorsports.

Early in his racing career, Sacks was a successful driver in what is now the NASCAR Featherlite Modified Series. Competing from 1980 to 1983, he won 17 races at Stafford Motor Speedway. Nineteen-eighty two was an especially good year for him, as he won the track championship that year, as well as the Spring Sizzler, The Ferrera 100 and the Fall Final]. Greg also won the Dogwood Classic at Martinsville Speedway, the Bud Classic at Oswego Speedway, the Thompson 300 at Thompson International Speedway, the World Series of Asphalt at Thompson Speedway and the Race of Champions at Pocono Raceway.

In 1983, he made his NASCAR Winston Cup Series debut in the Pepsi 400 at Daytona in the No. 5 car owned and sponsored by his father, Arnie. He only completed nineteen laps until experiencing engine failure, finishing 38th out of 40 cars. Sacks competed in four more events that season, posting a best finish of 17th in the Champion Spark Plugs 400 at Michigan International Speedway, the only race he finished that year.

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