In 1991 Cogan would join Team Menard to drive the No. 9 Glidden/Menards Lola T9100-Buick V6 at the Indianapolis 500. During qualifying Cogan was unable to make an attempt due to rain and would have to wait for the second day. Cogan would easily qualify for the race in 16th place with a speed that would have placed him easily in the top ten along with other drivers, such as teammate Gary Bettenhausen, Arie Luyendyk, Emerson Fittipaldi and Stan Fox. In the race Cogan was involved in a crash with Roberto Guerrero on lap 25. In the wreck Cogan broke his arm and leg. Original television footage was inconclusive, and Cogan firmly assessed the blame on Guerrero, claiming that Guerrero cut down on him. An amateur home video shot from the grandstands surfaced, however, which showed that Cogan may have moved up into Guerrero. At the very least, the video showed that it may have been a simple racing accident, although Cogan still holds Guerrero responsible. As a result of the crash Cogan missed the remainder of the year (Menard wasn't going to do anymore races) and the next year. Cogan scored no points during the season.