In the 1963 Tony Bettenhausen 200, Jim Clark and Team Lotus became the first to win an American Championship race with a rear-engined, monocoque car. After finishing second in that year's Indianapolis 500, Lotus decided to run the car again at Milwaukee and Trenton. Clark and teammate Dan Gurney broke the track record by over a second in qualifying, and Clark led all 200 laps to win, lapping the entire field except for second place A. J. Foyt.