Wallin, 35, has a record of 28-3 and is best known for pushing Tyson Fury in 2019 and opening a deep cut that almost changed the fight.
He lost to Anthony Joshua in December 2023 and to Derek Chisora in February 2025.
He has lost two of his last four fights since 2023 and has not shown the same form he showed in his competitive loss to Fury. This version of Wallin is far from the one beaten by Chisora in February 2025.
In that fight, Wallin did not maintain a steady work rate and struggled to make an impact with his punches. He was not known as a heavy puncher, but his output in that fight was lower than in earlier fights.
Wallin bounced back with a win in his most recent outing, stopping Chris Thomas in the second round last November, but that result came against limited opposition and did little to change his position in the division.
Those results leave him out of the immediate title picture, making his signing more about adding experience than introducing a new heavyweight contender.
Zuffa Boxing has continued to bring in recognizable names as it builds its presence in the sport, and Wallin fits that pattern. He has remained active, but his recent performances have not placed him among the top fighters in the division.
Signing with Zuffa could put Wallin in a structure with controlled matchups, where the level of opposition is different from the top heavyweights he has faced recently.
The move gives Wallin a new platform at this stage of his career, while also giving Zuffa another heavyweight option as he continues to build his roster.
No opponent or fight date has been confirmed for his debut under the promotion.
