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Sumbu Kalambay had a total of six losses in his professional boxing career — three of them in title bouts and three in non-title bouts. He suffered his first loss against Aldo Buzzetti via 8 round PTS on December 5, 1980. He has been stopped once and lost five times via decision.
Chris Pyatt, Mike McCallum, Michael Nunn, Ayub Kalule, and Duane Thomas are some of the boxers who have beaten Kalambay.
This is the first loss in Sumbu Kalambay's career. Kalambay lost to Aldo Buzzetti via 8 round PTS on in a non-title bout. He was 24 years old with a record of 2-0.
On Kalambay lost to Duane Thomas via 10 round PTS in a non-title bout. He was 28 years old with a record of 34-1-1.
On Kalambay lost to Ugandan boxer Ayub Kalule via 12 round split decision in a non-title bout. He was 29 years old with a record of 37-2-1. Kalule was 31 years old with a record of 45-3.
On Kalambay lost to American boxer Michael Nunn via 1st round KO. He was fighting for Nunn's middleweight IBF title, he was 32 years old with a record of 46-3-1. Nunn was 25 years old with a record of 32-0.
On Kalambay lost to Jamaican boxer Mike McCallum in a rematch via 12 round split decision. He was fighting for McCallum's middleweight WBA title, he was 34 years old with a record of 51-4-1. McCallum was 35 years old with a record of 39-1.
On Kalambay lost to Chris Pyatt via 12 round unanimous decision. He and Pyatt were fighting for the vacant middleweight WBO title. He was 37 years old with a record of 57-5-1.