Early career In 2015, Kavanagh made it to the finals of the
International Mixed Martial Arts Federation (IMMAF) World Championships, losing to Canadian fighter Jamie Herrington when the referee jumped in and stopped the fight in the third round. Afterwards, Herrington contacted her on Facebook to admit that she had failed a drug test and offered her apologies. Kavanagh made her professional MMA debut against
Hatice Özyurt at
BAMMA 22: Duquesnoy vs. Loughnane on 19 September 2015, defeating Ozyurt via TKO 17 seconds into the bout. Next up was future UFC fighter
Zarah Fairn at
BAMMA 24: Ireland vs. England on 26 February 2016. She won the close bout via split decision. From there, Kavanagh secured her third consecutive win against Polish fighter Katarzyna Sadura
BAMMA 26: Saadeh vs. Young, which she won via KO in the first round.
Bellator MMA Kavanagh made her Bellator debut against
Elina Kallionidou at
Bellator 169 on 16 December 2016; she won the bout by unanimous decision. She faced Iony Razafiarison on 24 February 2017 at
Bellator 173, losing by unanimous decision. Kavanagh returned to face former Australian boxing champ
Arlene Blencowe on 25 August 2017 at
Bellator 182. She lost the fight via split decision. She later defeated Maria Casanova via TKO at
Bellator 187 on 10 November 2017. Kavanagh faced
Janay Harding at
Bellator 207 on 12 October 2018. She lost the bout after it was stopped due to a cut. She was scheduled to face
Olga Rubin at
Bellator 217, however, she pulled out of the bout due to injury. She faced
Leslie Smith in her promotional debut at
Bellator 224 on 12 July 2019. She lost the fight by majority decision. The bout against
Olga Rubin was rebooked for
Bellator 234 on 15 November 2019. She won the bout via TKO in the second round. Kavanagh won a bout with
Katharina Lehner at
Bellator Milan 3 on 3 October 2020, by unanimous decision. Kavanagh fought for the
Bellator Women's Featherweight Championship against
Cris Cyborg on 12 November 2021 at
Bellator 271. After exchanging on the feet, Kavanagh was knocked out early in the first round. Kavanagh faced
Leah McCourt on 25 February 2022 at
Bellator 275. Even though she injured her knee during the bout, Kavanagh won the bout via unanimous decision. Kavanagh faced
Janay Harding in a rematch on 25 February 2023 at
Bellator 291. She won the fight by unanimous decision. Kavanagh faced
Sara Collins on 23 September 2023 at
Bellator 299. She lost the fight via split decision. Kavanagh was scheduled to rematch
Leah McCourt on 22 March 2024 at
Bellator Champions Series 1. On 20 February, McCourt announced that she was out of the bout due to broken ribs and a torn oblique. Kavanagh faced
Arlene Blencowe in a rematch on 22 June 2024 at
Bellator Champions Series 3 and lost the bout by a guillotine choke submission. ==Mixed martial arts record==