Gregory Jack Biffle (born December 23, 1969) is an American former professional stock car racing driver. He last drove in 2016, last driving in the No. 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. He won the 2000 Craftsman Truck championship. He reprised 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 from 2003 until 2016, winning 19 races in the No. 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-nine drivers to win a race in each of NASCAR's three national series.