 Donelli served as head coach of the Pittsburgh Steelers during the 1941 fall campaign on the bluff of Duquesne University.The Dukes were on their way to an undefeated season in 1941 and after the Steelers lost their first two games coach (and later NFL Commissioner) Bert Bell resigned, having Donelli replace him.Aldo would coach the Steelers in the morning during classes at Duquesne University and then the Dukes in the afternoon.