In 1999, Sprague won three races as well as the Craftsman Truck Series championship by eight points. He also drove at Watkins Glen in a Terry Labonte-owned car, finishing twelfth, and attempted the Exide NASCAR Select Batteries 400 for Tyler Jet Motorsports, but failed to qualify. He won three more times in 2000, but crashes caused him to drop to fifth in the standings. In 2001, NetZero became his primary sponsor, and he won seven poles and four races, and took home his third championship trophy.