He spent four seasons with the Cleveland Rams, leaving pro football to enlist in the service in 1942. Corbett served as a rifleman with the Second Infantry Division in France during World War II. He was wounded in action in 1944, and continued his service in England after recovering from his injuries.
After returning to the States, Corbett worked as an official for games in the Big Ten Conference. From 1952 until his death, he worked for the Scott Foresman publishing company. He died while on a fishing trip in Maine in May 1968. He lost his footing while stepping out of a boat, fell on a tree branch, and ruptured his spleen.