1991: Late in the race, Mario Andretti was running in the top five, although a few laps down. On lap 188, Mario's son Michael Andretti took the lead in dramatic fashion on a restart, passing Rick Mears who was driving for car owner Roger Penske, on the outside of turn one. One lap later, Mears pulled the same move, and re-took the lead for himself. Mears began to pull away, and Michael's hopes for victory began to fade. Suddenly Mario coasted to a stop at the entrance to the pits, bringing out the caution. A mild controversy emerged when observers speculated that Mario had stopped on purpose to help Michael. The field bunched up under the yellow, which gave Michael one last chance to challenge for the win. Mears held off Michael for the win, and the controversy eventually fizzled.