| 2026-03-28 | UFC Fight Night: Adesanya vs. Pyfer | Women’s Flyweight | Alexa Grasso def. Maycee Barber | KO (punch) | 1 | 2:42 |
| 2025-12-06 | UFC 323: Dvalishvili vs. Yan 2 | Women’s Flyweight | Maycee Barber def. Karine Silva | Decision (unanimous) (30–27, 29–28, 29–28) | 3 | 5:00 |
| 2024-03-09 | UFC 299: O'Malley vs. Vera 2 | Women’s Flyweight | Maycee Barber def. Katlyn Chookagian | Decision (unanimous) (30–27, 30–27, 29–28) | 3 | 5:00 |
| 2023-06-24 | UFC on ABC: Emmett vs. Topuria | Women’s Flyweight | Maycee Barber def. Amanda Ribas | TKO (punches and elbows) | 2 | 3:42 |
| 2023-03-25 | UFC on ESPN: Vera vs. Sandhagen | Women’s Flyweight | Maycee Barber def. Andrea Lee | Decision (split) (28–29, 29–28, 30–27) | 3 | 5:00 |
| 2022-07-02 | UFC 276: Adesanya vs. Cannonier | Women’s Flyweight | Maycee Barber def. Jessica Eye | Decision (unanimous) (29–28, 29–28, 30–27) | 3 | 5:00 |
| 2022-04-23 | UFC Fight Night: Lemos vs. Andrade | Women’s Flyweight | Maycee Barber def. Montana De La Rosa | Decision (unanimous) (30–27, 30–27, 30–27) | 3 | 5:00 |
| 2021-07-24 | UFC on ESPN: Sandhagen vs. Dillashaw | Women’s Flyweight | Maycee Barber def. Miranda Maverick | Decision (split) (28–29, 29–28, 29–28) | 3 | 5:00 |
| 2021-02-13 | UFC 258: Usman vs. Burns | Women’s Flyweight | Alexa Grasso def. Maycee Barber | Decision (unanimous) (29–28, 29–28, 29–28) | 3 | 5:00 |
| 2020-01-18 | UFC 246: McGregor vs. Cowboy | Women’s Flyweight | Roxanne Modafferi def. Maycee Barber | Decision (unanimous) (30–27, 30–27, 30–26) | 3 | 5:00 |
| 2019-10-18 | UFC on ESPN: Reyes vs. Weidman | Women’s Flyweight | Maycee Barber def. Gillian Robertson | TKO (punches) | 1 | 3:04 |
| 2019-03-23 | UFC Fight Night: Thompson vs. Pettis | Women’s Flyweight | Maycee Barber def. JJ Aldrich | TKO (knee and punches) | 2 | 3:01 |
| 2018-11-10 | UFC Fight Night: The Korean Zombie vs. Rodríguez | Women’s Strawweight | Maycee Barber def. Hannah Cifers | TKO (punches) | 2 | 2:01 |