Sydney LeBlanc has five losses against five opponents on his boxing record. For a list of LeBlanc's best fights, refer to "Best fights of Sydney LeBlanc".
On October 19, 2017 Sydney LeBlanc faced off against Kali Reis at age 34. He was coming in with a record of 4-5-1 (0), and Reis was 31 years old and with a record of 11-6-1 (4). LeBlanc lost the fight via 6-round unanimous decision.
On August 26, 2017 Sydney LeBlanc faced off against Savannah Marshall at age 33. He was coming in with a record of 4-4-1 (0), and Marshall was 26 years old and with a record of . LeBlanc lost the fight via 4-round unanimous decision.
On August 12, 2017 Sydney LeBlanc faced off against Franchón Crews-Dezurn at age 33. He was coming in with a record of 4-3-1 (0), and Crews-Dezurn was 30 years old and with a record of 1-1 (1). LeBlanc lost the fight via 4-round unanimous decision.
On June 16, 2017 Sydney LeBlanc faced off against Claressa Shields in a super-middleweight bout at age 33. He was coming in with a record of 4-2-1 (0), and Shields was 22 years old and with a record of 2-0 (1). LeBlanc lost the fight via 8-round unanimous decision.
On April 9, 2017 Sydney LeBlanc faced off against Maricela Cornejo at age 33. He was coming in with a record of 4-1-1 (0), and Cornejo was 29 years old and with a record of 6-2 (2). LeBlanc lost the fight via 6-round unanimous decision.
