| 2026-09-26 | UFC Fight Night: Rosas Jr. vs. Barcelos | Bantamweight | Montel Jackson def. Ricky Simón | KO (punches) | 2 | 2:39 |
| 2026-03-28 | UFC Fight Night: Adesanya vs. Pyfer | Bantamweight | Ricky Simón vs. Adrian Yañez | Draw (majority) (29–28, 28–28, 28–28) | 3 | 5:00 |
| 2025-11-08 | UFC Fight Night: Bonfim vs. Brown | Bantamweight | Raoni Barcelos def. Ricky Simón | Decision (unanimous) (29–28, 29–28, 29–28) | 3 | 5:00 |
| 2025-06-14 | UFC on ESPN: Usman vs. Buckley | Bantamweight | Ricky Simón def. Cameron Smotherman | Decision (unanimous) (30–27, 30–27, 29–28) | 3 | 5:00 |
| 2025-02-22 | UFC Fight Night: Cejudo vs. Song | Bantamweight | Ricky Simón def. Javid Basharat | KO (punches) | 1 | 3:58 |
| 2024-06-29 | UFC 303: Pereira vs. Procházka 2 | Bantamweight | Vinicius Oliveira def. Ricky Simón | Decision (unanimous) (30–27, 30–27, 29–28) | 3 | 5:00 |
| 2024-01-13 | UFC Fight Night: Ankalaev vs. Walker 2 | Bantamweight | Mario Bautista def. Ricky Simón | Decision (unanimous) (30–27, 30–27, 29–28) | 3 | 5:00 |
| 2023-04-29 | UFC on ESPN: Song vs. Simón | Bantamweight | Song Yadong def. Ricky Simón | TKO (punches) | 5 | 1:10 |
| 2022-07-16 | UFC on ABC: Ortega vs. Rodríguez | Bantamweight | Ricky Simón def. Jack Shore | Submission (arm-triangle choke) | 2 | 3:28 |
| 2021-12-18 | UFC Fight Night: Lewis vs. Daukaus | Bantamweight | Ricky Simón def. Raphael Assunção | KO (punches) | 2 | 2:14 |
| 2021-02-13 | UFC 258: Usman vs. Burns | Featherweight | Ricky Simón def. Brian Kelleher | Decision (unanimous) (30–27, 30–27, 30–27) | 3 | 5:00 |
| 2021-01-20 | UFC on ESPN: Chiesa vs. Magny | Bantamweight | Ricky Simón def. Gaetano Pirrello | Submission (arm-triangle choke) | 2 | 4:00 |
| 2020-05-13 | UFC Fight Night: Smith vs. Teixeira | Bantamweight | Ricky Simón def. Ray Borg | Decision (split) (28–29, 29–28, 29–28) | 3 | 5:00 |
| 2019-12-07 | UFC on ESPN: Overeem vs. Rozenstruik | Bantamweight | Rob Font def. Ricky Simón | Decision (unanimous) (29–28, 29–28, 30–27) | 3 | 5:00 |
| 2019-07-13 | UFC Fight Night: de Randamie vs. Ladd | Bantamweight | Urijah Faber def. Ricky Simón | TKO (punches) | 1 | 0:46 |
| 2019-02-10 | UFC 234: Adesanya vs. Silva | Bantamweight | Ricky Simón def. Rani Yahya | Decision (unanimous) (30–27, 30–27, 30–25) | 3 | 5:00 |
| 2018-08-04 | UFC 227: Dillashaw vs. Garbrandt 2 | Bantamweight | Ricky Simón def. Montel Jackson | Decision (unanimous) (30–27, 30–27, 29–28) | 3 | 5:00 |
| 2018-04-21 | UFC Fight Night: Barboza vs. Lee | Bantamweight | Ricky Simón def. Merab Dvalishvili | Technical Submission (guillotine choke) | 3 | 5:00 |