
Tammara “Tamm” Thibeault is an undefeated Canadian professional boxer and the reigning unified IBF, WBO, and Ring Magazine Female Middleweight World Champion. Standing 6’0″ with a 78-inch reach, the towering southpaw has seamlessly translated an exceptionally decorated international amateur career into one of the fastest rises to world championship status in boxing history.
WBAN would also acknowledge Jeannine Garside of Canada that became a World champion going into the title fight with a 3-0-0 record in 2005. Ring belts for FEMALES did not exist until many years later. That was the major reason why WBAN created the WBAN P4P World title belt that was not a federation which has a pristine record of ONLY the best who have fought for the belt that includes, Garside, Claressa Shields, Amanda Serrano, Holly Holm, Diana Prazak, Miriam Lamare and more who have fought for the belt since 2008.
What impressed WBAN about this great boxer on the scene is she is humble, respectful and presents herself in such a professional manner, no trash talk, no antics, she just let her hands do the talking. We see great things happening for Tamm!
Born on December 27, 1996, in Saint-Georges, Quebec, Thibeault grew up and trains out of Shawinigan, Quebec. She began boxing at just ten years old. Beyond her elite physical talents, Thibeault is a highly accomplished academic, holding a bachelor’s degree in linguistics with minors in both Mandarin and Spanish.
Before joining the professional ranks, Thibeault was a global powerhouse in amateur boxing representing Team Canada.
- Olympics: Reached the quarterfinals at the Tokyo 2020 Olympic Games.
- World Championships: Captured a Gold Medal at the 2022 IBA World Boxing Championships in Istanbul and a Bronze Medal in 2019.
- Commonwealth Games: Won a Gold Medal at the 2022 Birmingham Games and a Bronze Medal in 2018.
- Pan American Games: Secured a Gold Medal at the 202Santiago Games and a Silver Medal at Lima 2019.
Signed to Jake Paul’s Most Valuable Promotions (MVP), Thibeault chose a rigorous path by bypassing standard developmental matches to fight extended, high-intensity three-minute rounds—a structural shift she adapted from her inspiration, Amanda Serrano.
In some of the media sources they state that she was the first to make a pro debut fighting three-minute rounds. This is absolutely inaccurate. Sue TL Fox fought in 1976 three minute rounds for her pro debut in Portland, Oregon. WBAN is always “setting the record straight” with the “History Firsts” dilemma that we often hear with the newer boxers on the scene. Go to https://wbanmember.com for WBAN’s Database on the history!

On August 8, 2026, in just her fifth professional fight, Thibeault achieved world champion status at the Caribe Royale Resort in Orlando, Florida. She completely outclassed unified champion Desley Robinson via a 100-90 shutout unanimous decision, making her the fastest professional fighter to ever secure the Ring Magazine world championship.
Professional Boxing Record
Thibeault’s professional record stands undefeated at 5 wins, 0 losses (3 KOs). She consistently campaigns at the Middleweight limit (160 lbs). [, 2]
| Date | Opponent | Result | Method | Round | Weight | Location | Notes |
| Aug 8, 2026 | Desley Robinson | Win | UD | 10 (10) | 159.4 lbs | Orlando, Florida, U.S. | Won IBF, WBO, & Ring Magazine World Middleweight Titles |
| Sep 27, 2025 | Cristina Mazzotta | Win | TKO | 1 (6) | 159.0 lbs | Montreal, Quebec, Canada | Stopped opponent in 56 seconds |
| Jul 11, 2025 | Mary Casamassa | Win | TKO | 5 (6) | 158.5 lbs | New York City, New York, U.S. | Scored a knockdown in Round 1 |
| Mar 7, 2025 | Sonya Dreiling | Win | TKO | 1 (6) | 159.5 lbs | Toronto, Ontario, Canada | First fight hosted in Canada |
| Dec 13, 2024 | Natasha Spence | Win | UD | 4 (4) | 159.0 lbs | Orlando, Florida, U.S. | Professional Debut |