Listed at 6" 0", 180 pounds, Donahue batted and threw right-handed. He was born in Chicago, Illinois. Donahue was one of several players who only appeared in the majors during World World War World War II In eight relief appearances, he posted a 0-2 record with a 6.75 earned run average with no saves, giving up 11 runs (one unearned) on 22 hits and three walks while striking out three in 13 ⅔ innings of work.
Following his baseball career, Donahue worked as a movie theatre projectionist in the Chicago area for 40 years.
He died in Glenview, Illinois, at the age of 87.