William Knight has six losses against six opponents on his MMA record. For a list of Knight's best fights, refer to "Best fights of William Knight".
On May 12, 2023 William Knight fought Domingos Barros in a heavyweight title fight for the CES Championship title. Knight was 35 years old and with a record of 11-6 (9). Knight lost the fight via 5-round majority decision.
On February 18, 2023 William Knight faced off against Marcin Prachnio in a heavyweight bout at age 34. He was coming in with a record of 11-5 (9), and Prachnio was 34 years old and with a record of 15-6 (12). Knight lost the fight via 3-round unanimous decision.
On April 16, 2022 William Knight faced off against Devin Clark in a heavyweight bout at age 34. He was coming in with a record of 11-4 (9), and Clark was 32 years old and with a record of 12-6 (4). Knight lost the fight via 3rd-round TKO.
On February 12, 2022 William Knight faced off against Maxim Grishin in a light-heavyweight bout at age 33. He was coming in with a record of 11-3 (9), and Grishin was 37 years old and with a record of 31-9-2 (22). Knight lost the fight via 3-round unanimous decision.
On April 10, 2021 William Knight faced off against Da Un Jung in a light-heavyweight bout at age 33. He was coming in with a record of 9-2 (8). Knight lost the fight via 3-round unanimous decision.
On November 22, 2019 William Knight faced off against Tafon Nchukwi in a heavyweight bout at age 31. He was coming in with a record of 6-1 (6), and Nchukwi was 25 years old and with a record of 2-0 (2). Knight lost the fight via 1st-round TKO.
