2021–2022 Owen has found success in
submission wrestling, first competing for
Polaris Pro Grappling at Polaris 18 on 27 November 2021, defeating Max Bickerton on the preliminary card. He returned at the promotion's next event on 26 March 2022 to compete against Freddie Vosgrone. Livesey won a unanimous decision against Vosgrone on the main card. On 21 May 2022 Livesey competed won a unanimous decision against Michael Pixley at Grapplefest 12. He was then invited to return to Polaris to compete at Polaris 21 against ADCC veteran
Josh Hinger on 24 September 2022. At the
2022 Catch Wrestling World Championships hosted by
The Snake Pit at the
University of Bolton Stadium, Livesey won the
heavyweight (-100kg) division. Shortly after, Livesey was announced as the official alternate for the 99 kg division at the
2022 ADCC World Championship. He was given the call to compete with around a week's notice, as Luccas Lira Costa was forced to withdraw due to visa issues. Livesey was eliminated in the opening round by the eventual champion,
Kaynan Duarte. The following week, on 24 September 2022, Livesey defeated Josh Hinger by split decision at Polaris 21. Livesey competed in the Polaris Middleweight Grand Prix on 25 November 2022. He was submitted by Hunter Colvin in the opening round.
2023–2024 On 11 March 2023 Livesey was booked to compete against former UFC middleweight champion
Chris Weidman in the main event of Polaris 23. He won the match by unanimous decision. Livesey was scheduled to compete at
Quintet 4 on 10 September 2023 where represented Team Polaris. Livesey drew his only match against
Nick Rodriguez and his team went out in the opening round. Livesey then competed in an 8-man absolute grand prix tournament at
Polaris 25 on 30 September 2023. He went out in the opening round after losing a decision to Fabricio Andrey. Livesey competed in a catch wrestling match against
Josh Barnett at
2023 Catch Wrestling World Championships on October 28. He won the match by decision. Livesey was due to compete against
Yoel Romero in an openweight match at Polaris 28 on 15 June 2024. Romero had to withdraw from the match and was replaced by Baissangour Chamsoudinov, Livesey was originally declared the winner but the match was rescored as a draw. Livesey competed in the over 80 kg division at the inaugural
Craig Jones Invitational on 16–17 August 2024. He beat Mahamed Aly by decision in the opening round and was submitted by eventual winner
Nick Rodriguez in the quarter-final. ==Mixed martial arts career==