Donohue began racing in selected races in 1992, with his first full season being 1994 when he won the Bridgestone Supercar Championship in a BMW M5.
Donohue continued his association with BMW in 1995 and 1996 and is credited with the first-ever podium finish for BMW of North America’s M3 GT racing effort.
In 1996 Donohue joined Chrysler’s fledgling Super-Touring program where he won the first ever Super Touring car race in North America in a Dodge Stratus and went on to capture the CART Super Touring Driver’s Championship in 1997.
Joining DaimlerChrysler’s Dodge Viper program for the next three years, Donohue co-drove a Dodge Viper GTS-R to a 1998 GT-2 class victory in his very first drive at the 24 Hours of Le Mans, and took six GTS class victories in the American Le Mans Series in 1999 and 2000.
2001 saw Donohue on ovals as he drove three races in the NASCAR Craftsman Truck Series and twelve Busch Grand National Series before returning to road racing in 2002 as a long-distance specialist for Panoz Motorsports in the ALMS’s LMP 900 class.
In 2003 Donohue joined Brumos Racing in their Porsche-powered, Daytona Prototype in the Grand Am’s new top class. In 2005 Porsche enlisted Donohue to drive their Carrera GT road car to a closed course lap record speed of over 196 mph and a closed course flying mile record speed of over 198 mph. In addition to his racing duties in 2006, Donohue was also an IROC test driver for the season.