Mitch Gagnon has five losses against five opponents on his MMA record. For a list of Gagnon's best fights, refer to "Best fights of Mitch Gagnon".
On May 4, 2019 Mitch Gagnon faced off against Cole Smith in a bantamweight bout at age 34. He was coming in with a record of 12-5 (10), and Smith was 30 years old and with a record of 6-0 (5). Gagnon lost the fight via 3-round unanimous decision.
On December 10, 2016 Mitch Gagnon faced off against Matthew Lopez in a bantamweight bout at age 32. He was coming in with a record of 12-4 (10), and Lopez was 29 years old and with a record of 8-1 (7). Gagnon lost the fight via 3-round unanimous decision.
On December 20, 2014 Mitch Gagnon faced off against Renan Barão in a bantamweight bout at age 30. He was coming in with a record of 12-3 (10), and Barão was 27 years old and with a record of 32-2 (22). Gagnon lost the fight via 3rd-round submission.
On July 21, 2012 Mitch Gagnon faced off against Bryan Caraway in a bantamweight bout at age 27. He was coming in with a record of 8-2 (8), and Caraway was 27 years old and with a record of 16-5 (15). Gagnon lost the fight via 3rd-round submission.
On February 27, 2009 Mitch Gagnon faced off against Will Romero at age 24. He was coming in with a record of 2-1 (2). Gagnon lost the fight via 3-round unanimous decision.