Mon 00:35
William Romero
"Leon"
"Leon"
| Date of Birth: | Nov 11, 1982 (Age 43) |
| Fighting out of: | Stoney Creek, Ontario, Canada  |
| Born In: | Canada |
| Team: | Tiger Muay Thai |
| Weight: | 145 lb / 66 kg |
| Height: | 176 cm / 5'9" |
| Result | Opponent | Weight | # | Method | Event | Date | Location |
|---|---|---|---|---|---|---|---|
| Loss | Patricio Freire | 145 lb | 
| Submission (heel hook), R1 (2:01) | Bellator 15 | 2010-04-22 |  Uncasville, Connecticut, USA |
Tapology
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google2010-04-22 - Bellator 15 - Uncasville, Connecticut, USA
Uncasville, Connecticut, USA| Result | Opponent | Weight | # | Method | Event | Date | Location |
|---|---|---|---|---|---|---|---|
| Loss | Patricio Freire | 145 lb |
| Submission (heel hook), R1 (2:01) | Bellator 15 | 2010-04-22 | Uncasville, Connecticut, USA |
Bellator Featherweight Grand Prix Quarter-final Match (145 lb / 66 kg) ~
Winner: Patricio Freire via Submission (heel hook) in round 1 (2:01)
| User #1 |  |
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Patricio Freire via Submission in round 2 |
| User #2 | |
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Patricio Freire via Submission in round 3 |
| User #3 | |
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William Romero via Submission in round 1 |
| User #4 | |
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Patricio Freire via Decision |
| User #5 | |
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Patricio Freire via KO in round 1 |
| User #6 | |
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Patricio Freire via Submission in round 2 |
| Result | Opponent | Weight | # | Method | Event | Date | Location |
|---|---|---|---|---|---|---|---|
| Win | Dan Ige | 145 lb | Decision (unanimous) | UFC 318: Holloway vs. Poirier 3 | 2025-07-19 | New Orleans, Louisiana, USA |
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| Loss | Yair Rodriguez | 145 lb | Decision (unanimous) | UFC 314: Volkanovski vs. Lopes | 2025-04-12 | Miami, Florida, USA |
|
| Win | Jeremy Kennedy | 145 lb | TKO (knees and punches), R3 (4:07) | Bellator Champions Series: Belfast | 2024-03-22 |  Belfast, Northern Ireland |
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| Loss | Chihiro Suzuki | 154 lb | KO (punch), R1 (2:32) | Super Rizin 2 | 2023-07-30 |  Saitama, Japan |
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| Loss | Sergio Pettis | 135 lb |  |
Decision (unanimous) | Bellator 297: Nemkov vs. Romero | 2023-06-16 | Chicago, Illinois, USA |
| Win | Kleber Koike Erbst | 146 lb | Decision (unanimous) | Bellator MMA vs. Rizin | 2022-12-31 | Saitama, Japan |
|
| Win | Ádám Borics | 145 lb | |
Decision (unanimous) | Bellator 286: Pitbull vs. Borics | 2022-10-01 | Long Beach, California, USA |
| Win | A.J. McKee | 145 lb | |
Decision (unanimous) | Bellator 277: McKee vs. Pitbull 2 | 2022-04-15 | San Jose, California, USA |
| Loss | A.J. McKee | 145 lb | |
Technical Submission (guillotine choke), R1 (1:57) | Bellator 263: Pitbull vs. McKee | 2021-07-31 | Inglewood, California, USA |
| Win | Emmanuel Sanchez | 145 lb | |
Technical Submission (guillotine choke), R1 (3:35) | Bellator 255 | 2021-04-02 | Uncasville, Connecticut, USA |
| Win | Pedro Carvalho | 145 lb | |
KO (punch), R1 (2:10) | Bellator 252: Pitbull vs. Carvalho | 2020-11-12 | Uncasville, Connecticut, USA |
| Win | Juan Archuleta | 145 lb | |
Decision (unanimous) | Bellator 228: Pitbull vs. Archuleta | 2019-09-28 | Inglewood, California, USA |
| Win | Michael Chandler | 155 lb | |
TKO (punches), R1 (1:01) | Bellator 221: Chandler vs. Pitbull | 2019-05-11 | Rosemont, Illinois, USA |
| Win | Emmanuel Sanchez | 145 lb | |
Decision (unanimous) | Bellator 209: Pitbull vs. Sanchez | 2018-11-15 |  Tel Aviv, Israel |
| Win | Daniel Weichel | 145 lb | |
Decision (split) | Bellator 203: Pitbull vs. Weichel 2 | 2018-07-14 |  Rome, Italy |
| Win | Daniel Straus | 145 lb | |
Submission (guillotine choke), R2 (0:37) | Bellator 178: Straus vs. Pitbull 4 | 2017-04-21 | Uncasville, Connecticut, USA |
| Loss | Benson Henderson | 155 lb | TKO (leg injury), R2 (2:26) | Bellator 160: Henderson vs. Pitbull | 2016-08-26 | Anaheim, California, USA |
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| Win | Henry Corrales | 145 lb | Submission (guillotine choke), R2 (4:09) | Bellator 153: Koreshkov vs. Henderson | 2016-04-22 | Uncasville, Connecticut, USA |
|
| Loss | Daniel Straus | 145 lb | |
Decision (unanimous) | Bellator 145: Vengeance | 2015-11-06 | St. Louis, Missouri, USA |
| Win | Daniel Weichel | 145 lb | |
KO (punch), R2 (0:32) | Bellator 138: Kimbo vs. Shamrock | 2015-06-19 | St. Louis, Missouri, USA |
| Win | Daniel Straus | 145 lb | |
Submission (rear naked choke), R4 (4:49) | Bellator 132: Pitbull vs. Straus | 2015-01-16 | Temecula, California, USA |
| Win | Pat Curran | 145 lb | |
Decision (unanimous) | Bellator 123 | 2014-09-05 | Uncasville, Connecticut, USA |
| Win | Justin Wilcox | 145 lb |  |
TKO (punches), R1 (2:23) | Bellator 108 | 2013-11-15 | Atlantic City, New Jersey, USA |
| Win | Fabricio Guerreiro | 145 lb | 
| Decision (unanimous) | Bellator 103 | 2013-10-11 | Mulvane, Kansas, USA |
| Win | Diego Nunes | 145 lb |
| KO (punches), R1 (1:19) | Bellator 99 | 2013-09-13 | Temecula, California, USA |
| Win | Jared Downing | 145 lb | KO (punch), R2 (0:54) | Bellator 97 | 2013-07-31 | Rio Rancho, New Mexico, USA |
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| Loss | Pat Curran | 145 lb | |
Decision (split) | Bellator 85 | 2013-01-17 | Irvine, California, USA |
| Win | Daniel Straus | 145 lb | |
Decision (unanimous) | Bellator 45 | 2011-05-21 | Lake Charles, Louisiana, USA |
| Win | Wilson Reis | 145 lb |
| KO (punches), R3 (3:29) | Bellator 41 | 2011-04-16 | Yuma, Arizona, USA |
| Win | Georgi Karakhanyan | 145 lb |
| KO (punches), R3 (0:56) | Bellator 37 | 2011-03-19 | Concho, Oklahoma, USA |
| Loss | Joe Warren | 145 lb | |
Decision (split) | Bellator 23 | 2010-06-24 | Louisville, Kentucky, USA |
| Win | Wilson Reis | 145 lb |
| Decision (unanimous) | Bellator 18 | 2010-05-13 | Monroe, Louisiana, USA |
| Win | William Romero | 145 lb |
| Submission (heel hook), R1 (2:01) | Bellator 15 | 2010-04-22 | Uncasville, Connecticut, USA |
Bellator Featherweight Grand Prix Quarter-final Match (145 lb / 66 kg) ~
Winner: Patricio Freire via Submission (heel hook) in round 1 (2:01)
| User #1 | Patricio Freire via Submission in round 2 |
| User #2 | Patricio Freire via Submission in round 3 |
| User #3 | William Romero via Submission in round 1 |
| User #4 | Patricio Freire via Decision |
| User #5 | Patricio Freire via KO in round 1 |
| User #6 | Patricio Freire via Submission in round 2 |