Donakowski studied and ran at University of Michigan. At the 1978 Tennessee Dogwood Relays, he recorded 28:25.8 in the 10,000 meters. Which still stands as University of Michigan 10,000 meter school record.[1] He ran his personal best time over 10,000 meters at the 1979 Penn Relays, where he finished in 28:13.9.[1]
After his studies, he transitioned into a marathoner. He won the 1986 Twin Cities Marathon in a personal best time of 2:10:40, taking home $25,000 in prize money.[4] He was a pre-race favorite at the 1988 US Olympic Trials for the marathon, but dropped out due to a sore achilles tendon.[5]