Christian Lee has four losses against three opponents on his MMA record. For a list of Lee's best fights, refer to "Best fights of Christian Lee".
On September 24, 2021 Christian Lee met Ok Rae-yoon in a lightweight (ONE Championship) title defense fight. Lee was 23 years old and with a record of 15-4 (14). Lee lost the fight via 5-round unanimous decision and lost the title.
On September 8, 2018 Christian Lee faced off against Edward Kelly in a featherweight bout at age 20. He was coming in with a record of 9-3 (9). Lee lost the fight via 1-round disqualification.
On May 18, 2018 Christian Lee fought Martin Nguyen in a featherweight title fight for Nguyen's ONE Championship title. Lee was 19 years old and with a record of 9-2 (9), and Nguyen was 29 years old and with a record of 10-2 (9). Lee lost the fight via 5-round split decision.
On August 13, 2016 Christian Lee faced off against Martin Nguyen in a featherweight bout at age 18. He was coming in with a record of 5-1 (5), and Nguyen was 27 years old and with a record of 6-1 (6). Lee lost the fight via 1st-round choke-out.
