Gregory Jack "Greg" Biffle (born December 23, 1969) is an American professional driver. He is inactive as of 2017, who last drove in the 16 Ford Fusion for Roush Fenway Racing. After racing in the NASCAR Winter Heat Series in the mid-1990s, he was recommended to Jack Roush by former announcer Benny Parsons. He was the 1998 NASCAR Craftsman Truck Series Rookie of the Year, shortly thereafter winning the 2000 Craftsman Truck championship. He repeated this progression in the NASCAR Busch Series, winning the 2001 Rookie of the Year, immediately followed by winning the 2002 championship. Biffle drove in the NASCAR Sprint Cup Series for Roush Fenway Racing from 2003 until 2016, winning 19 races in the #16 Ford. He currently is an analyst for NBC Sports' show NASCAR America.
Biffle, who began his NASCAR career in 1995, is the first of only three drivers that have won a championship in both the Busch Series and the Craftsman Truck Series, and the sixth of only twenty-six drivers to win a race in each of NASCAR's three national series.