 McQuinn raced in 10 Indianapolis 500 races, with career-best seventh-place finishes in 1938 and 1941.After McQuinn retired, he was appointed the chief steward at Indianapolis, and the head of the champ car division for AAA and USAC.He died on January 1, 1986, before he could attend his induction in the National Midget Auto Racing Hall of Fame later that year.