On June 5, 1940, Billy Conn and Gus Lesnevich met again in a rematch.
Conn came in to the fight on a 11-fight win streak with a 13% KO rate, and was fighting after a gap of 4 months and 26 days.
Billy Conn defeated Gus Lesnevich via unanimous decision in the rematch and successfully defended his The Ring light-heavyweight title. Conn improves his record to 52-9-1
On November 17, 1939, the 22-year-old The Ring light-heavyweight world champion, Billy Conn (49-9-1, 8 KOs), faced Gus Lesnevich, in a title defense fight.
Conn came in to the fight on a 9-fight win streak with a 13% KO rate, and was fighting after a gap of 1 month and 23 days.
Billy Conn defeated Gus Lesnevich via unanimous decision and successfully defended his The Ring light-heavyweight title. Conn improves his record to 50-9-1
On September 25, 1939, Billy Conn and Melio Bettina met again in a rematch.
Conn came in to the fight on a 8-fight win streak with a 13% KO rate, and was fighting after a gap of 1 month and 11 days.
Billy Conn defeated Melio Bettina via unanimous decision in the rematch and successfully defended his The Ring light-heavyweight title. Conn improves his record to 49-9-1
On July 15, 1939, a 21-year-old Billy Conn (46-9-1, 7 KOs) got a shot at the The Ring light-heavyweight title held by Melio Bettina.
Conn came in to the fight on a 6-fight win streak with a 12% KO rate, and was fighting after a gap of 2 months and 3 days.
Billy Conn defeated Melio Bettina via unanimous decision and wins the The Ring title — in his first world-title fight. Conn improves his record to 47-9-1
On February 13, 1942, a 24-year-old Billy Conn (61-10-1, 13 KOs) and a 28-year-old Tony Zale (51-15-2, 29 KOs) met in the ring.
Conn came in to the fight on a 2-fight win streak with a 18% KO rate, and was fighting after a gap of 16 days. Zale was on a 8-fight win streak with a 42% KO rate, and fighting after a layoff of 2 months and 16 days.
Billy Conn defeated Tony Zale via unanimous decision in the 12-round fight. Conn improves his record to 62-10-1, while Zale adds a loss to his record at 51-16-2.
On February 10, 1939, a 21-year-old Billy Conn (44-9-1, 7 KOs) and Fred Apostoli met in the ring for the 2nd time,.
Conn came in to the fight on a 4-fight win streak with a 13% KO rate, and was fighting after a gap of 1 month and 4 days.
In the rematch, Billy Conn defeated Fred Apostoli via unanimous decision in the 15-round fight. Conn improves his record to 45-9-1
On August 10, 1936, an 18-year-old Billy Conn (23-6-1, 3 KOs) and Teddy Movan met in the ring for the 5th time,.
Conn came in to the fight on a 12-fight win streak with a 10% KO rate, and was fighting after a gap of 11 days.
In the rematch, Billy Conn defeated Teddy Movan via unanimous decision in the 8-round fight. Conn improves his record to 24-6-1
On April 13, 1936, an 18-year-old Billy Conn (16-6-1, 3 KOs) and Steve Nickleash met in the ring for the 2nd time,.
Conn came in to the fight on a 5-fight win streak with a 13% KO rate, and was fighting after a gap of 28 days.
In the rematch, Billy Conn defeated Steve Nickleash via unanimous decision in the 6-round fight. Conn improves his record to 17-6-1
On February 17, 1936, an 18-year-old Billy Conn (14-6-1, 3 KOs) and Louis Cook met in the ring for the 2nd time,.
Conn came in to the fight on a 3-fight win streak with a 14% KO rate, and was fighting after a gap of 14 days.
In the rematch, Billy Conn defeated Louis Cook via unanimous decision in the 8-round fight. Conn improves his record to 15-6-1
On April 4, 1941, a 23-year-old Billy Conn (57-9-1, 11 KOs) and Gunnar Bärlund met in the ring.
Conn came in to the fight on a 17-fight win streak with a 16% KO rate, and was fighting after a gap of 30 days.
Billy Conn stopped Gunnar Bärlund via TKO in the 8th round. Conn improves his record to 58-9-1 (12 KOs)