John WeibelJohn D. Weibel was a college football player and coach and medical doctor.College footballPlayingNotre DameAt Notre Dame, Weibel was one of the "Seven mules" who blocked for the Four Horsemen.CoachingVanderbiltWeibel was assistant grid coach and scout under Dan McGugin for 2 years at Vanderbilt while also attending Vanderbilt Medical School.DuquesneStarting in September 1927, Weibel was first assistant and line coach at Duquesne under fellow Notre Dame teammate and 4 horseman Elmer Layden while completing his medical internship at Mercy Hospital in Pittsburgh.DeathHe died February 17, 1931, in Pittsburgh from peritonitis after contracting appendicitis. Notre Dame coach Knute Rockne "often said Weibel was one of the principal factors in the success of the 'Horseman.'"