Here is a list of Conn's best fights. For a list of Conn's losses, refer to "Billy Conn Losses".
On February 13, 1942 Billy Conn faced off against Tony Zale at age 24. He was coming in with a record of 62-10-1 (13), and Zale was 28 years old and with a record of 51-15-2 (29). Conn won the fight via 12-round unanimous decision.
On December 28, 1936 Billy Conn faced off against Fritzie Zivic at age 19. He was coming in with a record of 30-6-1 (5), and Zivic was 23 years old and with a record of 48-16-4 (26). Conn won the fight via 10-round split decision.