Sumbu Kalambay has six losses against six opponents on his boxing record. For a list of Kalambay's best fights, refer to "Best fights of Sumbu Kalambay".
On May 19, 1993 Sumbu Kalambay fought Chris Pyatt in a middleweight world-title fight for the WBO title. Kalambay was 37 years old and with a record of 57-6-1 (33). Kalambay lost the fight via 12-round unanimous decision.
On April 1, 1991 Sumbu Kalambay fought Mike McCallum in a middleweight world-title fight for McCallum's WBA title. Kalambay was 34 years old and with a record of 51-5-1 (30), and McCallum was 35 years old and with a record of 39-1 (33). Kalambay lost the fight via 12-round split decision.
On March 25, 1989 Sumbu Kalambay fought Michael Nunn in a middleweight world-title fight for Nunn's IBF title. Kalambay was 32 years old and with a record of 46-4-1 (26), and Nunn was 25 years old and with a record of 32-0 (22). Kalambay lost the fight via 1st-round KO.
On December 19, 1985 Sumbu Kalambay faced off against Ayub Kalule in a middleweight bout at age 29. He was coming in with a record of 37-3-1 (23), and Kalule was 31 years old and with a record of 45-3 (23). Kalambay lost the fight via 12-round split decision.
On April 6, 1985 Sumbu Kalambay faced off against Duane Thomas at age 28. He was coming in with a record of 34-2-1 (23). Kalambay lost the fight via 10-round points decision.
On December 5, 1980 Sumbu Kalambay faced off against Aldo Buzzetti at age 24. He was coming in with a record of 2-1 (2). Kalambay lost the fight via 8-round points decision.
