Kenneth Sims Jr. has three losses against three opponents on his boxing record. For a list of Sims Jr.'s best fights, refer to "Best fights of Kenneth Sims Jr.".
On August 2, 2025 Kenneth Sims Jr. faced off against Oscar Duarte Jurado in a super-lightweight bout at age 31. He was coming in with a record of 22-3-1 (8), and Jurado was 29 years old and with a record of 29-2-1 (23). Sims Jr. lost the fight via 12-round majority decision.
On November 16, 2018 Kenneth Sims Jr. faced off against Samuel Teah in a super-lightweight bout at age 24. He was coming in with a record of 13-2-1 (4). Sims Jr. lost the fight via 8-round unanimous decision.
On July 14, 2017 Kenneth Sims Jr. faced off against Rolando Chinea at age 23. He was coming in with a record of 12-1 (4). Sims Jr. lost the fight via 8-round majority decision.
