In 1983, he competed at the inaugural IAAF Athletics World Championships in the American 4 × 400 m. relay team. However, he collided with a competing Soviet Union runner on the third leg, falling, leaving the American final leg runner, the great 400 m. hurdler Ed Moses, with no chance of victory despite his valiant but vain effort to catch the leaders - the team eventually finished down the field. Smith said "It was a stupid mistake. I almost quit the sport."