Joe Louis vs Billy Conn 2 1946-06-19. Joe Louis KOs Billy Conn in Rematch – This Day June 19, 1946 and retains the heavyweight crown. Fight Of The Year 1941 World Heavyweight Title Fight Venue: Polo Grounds, New York, USA. Joe Louis vs Billy Conn I [1941-06-18] Title: Joe Louis vs Billy Conn I Year: 1941-06-18 Language: English. Joe Louis vs Cesar Brion II [1951-08-01] Title: Joe Louis vs Cesar Brion II Year: 1951-08-01 Language: English.