| 2019-05-04 | UFC Fight Night: Iaquinta vs. Cowboy | Bantamweight | Cole Smith def. Mitch Gagnon | Decision (unanimous) (29–28, 29–28, 30–27) | 3 | 5:00 |
| 2016-12-10 | UFC 206: Holloway vs. Pettis | Bantamweight | Matthew Lopez def. Mitch Gagnon | Decision (unanimous) (29–28, 29–28, 29–27) | 3 | 5:00 |
| 2014-12-20 | UFC Fight Night: Machida vs. Dollaway | Bantamweight | Renan Barão def. Mitch Gagnon | Submission (arm-triangle choke) | 3 | 3:53 |
| 2014-10-04 | UFC Fight Night: MacDonald vs. Saffiedine | Bantamweight | Mitch Gagnon def. Roman Salazar | Submission (rear-naked choke) | 1 | 2:06 |
| 2014-04-16 | The Ultimate Fighter Nations Finale: Bisping vs. Kennedy | Bantamweight | Mitch Gagnon def. Tim Gorman | Decision (unanimous) (30–27, 30–27, 30–27) | 3 | 5:00 |
| 2013-09-21 | UFC 165: Jones vs. Gustafsson | Bantamweight | Mitch Gagnon def. Dustin Kimura | Technical Submission (guillotine choke) | 1 | 4:05 |
| 2012-09-22 | UFC 152: Jones vs. Belfort | Bantamweight | Mitch Gagnon def. Walel Watson | Submission (rear-naked choke) | 1 | 1:09 |
| 2012-07-21 | UFC 149: Faber vs. Barão | Bantamweight | Bryan Caraway def. Mitch Gagnon | Submission (rear-naked choke) | 3 | 1:39 |