 He raced before the AAA named an official national champion.McQuinn won 1938, 1939, and 1940 track championships at the 124th Field Artillery Armory in Chicago, the 1937 and 1938 Walsh Stadium track championships in St. Louis in 1937 and 1938, the 1938 Riverview track championship in Chicago, and the 1938 track title at the Milwaukee Mile.McQuinn won 61 feature races in 1938, which ranked him second behind Wally Zale.