The Tyrrell 001, which looked like the MS80, was first seen in . It earned Stewart a pole position in the Canadian GP. The car had problems in all of its 3 race starts. The nearly identical Tyrrell 003 won both Drivers' and Constructors' Championships in . Stewart's had health problems dealing with a stomach ulcer in 1972 and did not race. He was well in 1973 and raced again. He finishing 1st in the Championship. On October 6, 1973, Tyrrell's other driver was killed in practice for the US Grand Prix at Watkins Glen. Stewart, who was to stop racing at the end of the season, and Tyrrell decided they did not want to keep racing. Without their best driver, Tyrrell were never serious World Championship contenders again.