Otto Wallin

Wallin vs. Kisner Wallin then made his United States debut against Nick Kisner (21–4–1, 6 KOs) in April 2019, but the fight ended in a no contest after an accidental clash of heads opened a cut above Kisner's eye in the first round. Wallin lost the fight by unanimous decision, with the scorecards reading 116–112, 117–111, and 118–110. He opened up a large cut above Fury's right eye in the third round with a left hand, which affected Fury's vision for the rest of the fight. A ringside doctor examined the cut in the sixth and deemed Fury able to continue. The examination by the doctor seemed to motivate Fury, as he poured on the pressure afterwards, hurting Wallin repeatedly with solid shots. Despite fatiguing in the second half of the fight, Wallin came back in the twelfth and landed a strong left hand which seemed to trouble Fury. Commentators stated Wallin's performance had defied the odds despite the loss, as he came in as an over 10 to 1 underdog.

Career from 2020

Wallin vs. Kauffman Wallin was set to make his return to the ring against former WBA (Regular) heavyweight world champion Lucas Browne (29–2, 25 KOs) on 28 March 2020 at the Park Theater at the Park MGM in Las Vegas. The fight was scheduled for 10 rounds. On 26 February, Wallin was removed from the card due to a foot injury and was replaced by Apti Davtaev. He instead made his return against Travis Kauffman (32–3–0, 23 KOs) on 15 August 2020. Wallin dominated the fight, and Kauffman retired in the fifth round due to injury.

Wallin vs. Breazeale Wallin's next fight was against former IBF and WBC title challenger Dominic Breazeale (20–2–0, 18 KOs) on the undercard of Adrien Broner vs. Jovanie Santiago on 20 February 2021. The Swede was in control the whole fight and regularly found the target with his straight left hand, causing swelling around Breazeale's right eye. Wallin won a comfortable unanimous decision victory with scores of 117–111, 118–110 and 116–112.

On 15 September 2021, it was reported that terms had been agreed between Wallin and the WBC interim heavyweight champion, Dillian Whyte (28–2, 19 KOs), for a bout on 30 October at the O2 Arena in London, England. However, ten days before the fight was scheduled to occur, Whyte withdrew due to reportedly suffering a shoulder injury.

After the fight against Whyte fell through, Wallin was left without an opponent. He next returned to the ring in February 2022, in a late-notice bout against Polish journeyman Kamil Sokołowski (11–24–2, 4 KOs). Wallin defeated Sokołowski on points, then faced Rydell Booker (26–5–1, 13 KOs) on 26 May 2022 in Booker's home state of Michigan, easing to a decision victory. Wallin had another "stay-busy" fight against Mexican heavyweight Helaman Olguin (9–4–1, 4 KOs) in January 2023. He recorded a decision win, improving his record to 25–1.

Wallin vs. Gassiev On 12 September 2023, it was announced that Wallin would face Murat Gassiev (30–1, 23 KOs), former IBF and WBA world cruiserweight champion, in a fight where the WBA Intercontinental heavyweight belt was at stake. The bout took place in Antalya, Turkey on 30 September. Wallin was the busier of the two boxers, and won by split decision. Two judges scored it 115–113 for Wallin, while the third saw it 117–111 for Gassiev. The 117–111 scorecard for Gassiev was classed as "questionable" by media outlet Bad Left Hook. Wallin was the betting underdog against Gassiev, whose only prior loss had been against Oleksandr Usyk, and the victory was described as the biggest of Wallin's career to date.

Wallin vs. Joshua

On 15 November 2023, it was announced that Wallin would face former unified WBA, IBF, WBO heavyweight champion Anthony Joshua (26–3, 23 KOs) on 23 December 2023. The fight took place at Riyadh's Kingdom Arena in Saudi Arabia. Wallin found himself perpetually on the defensive, unable to penetrate Joshua's formidable jab and right hand, which effectively neutralized his offensive capabilities. The duel turned decisively in round 5 when Joshua unleashed a devastating punch that sent Wallin reeling backward, but Wallin displayed remarkable resilience, hanging on until the end of the round. Before the start of round 6, Wallin's coach Gamache made the decision to stop the fight, resulting in a corner retirement win for Joshua.

Wallin vs. Chisora

On 27 November 2024, Wallin was announced as a step in to fight Derek Chisora (35–13, 23 KOs) at Co-op Live in Manchester. Wallin, who was promoted by Salita, was given the opportunity after Jarrel Miller was dropped, due to promotional issues. The pair went face-to-face at a press conference the next day. The fight was billed was 'The Last Dance', hinting Chisora's retirement. Chisora had recently said he wanted to have 50 professional fights. The fight with Wallin would be his 49th in the pro ranks. Wallin said he was there to win, "I'm here to fight and here to win and that's all. I don't worry so much about The Last Dance and all that, this is my time. You're gonna get stopped." Chisora responded, "There's nothing you've got that I haven't tasted in my life. I don't believe you've got the power to bother me. Even the biggest punchers have not bothered me, so, you know, don't worry, I've got fear of you but it gives me that motivation to train harder. I'm definitely going to come for you." Lead promoter Frank Warren said the winner would be locked in to a big fight later in the year.

Wallin received a call from his manager Jolene Mizzone, the day after his birthday, to offer him the fight. He called it a belated birthday gift. The fight was scheduled for 10 rounds. During the final press conference, Chisora said, "I'm buzzing for this fight. It's going to be one exciting fight, I can tell you that now. Do not sit down because we're going to drown this guy. We're going to go hard. I know for a fact he hasn't trained the way I expect him to train for me, so I'm excited. I just want to fight." Chisora explained he was told to retire from boxing after 50 fights. Had he not been told, he could have 'gone to 100'. The press conference was billed as Chisora's final in the UK. Chisora weighed in at 259.7 pounds, 20 pounds heavier than Wallin, who came in at 239.1 pounds. During the face-off, Chisora jokingly put Wallin in a headlock and security had to break it up.

In front of 13,000 in attendance, Wallin was defeated by Chisora via unanimous decision. He was knocked down in the 9th and 12th rounds in the IBF title eliminator contest. In the opening round, Chisora fought on the inside attacking Wallin's body. It was more of the same in the next round until Wallin landed several left uppercuts on Chisora. He gained Wallin's attention in round 4 following a number of overhand rights. By round 5, Wallin was holding on. An accidental head clash caused a nasty cut between the right eye and eyebrow of Chisora. Referee John Latham sent Chisora to the ringside doctor to be examined a few times for the remainder of the fight, but was allowed to finish the fight. Chisora tired himself out in round 8, when he threw a 30–punch combination, however not all were clean punches and not all landed, but Wallin was hurt from this. The first knockdown occurred in round 9 when Chisora landed a right hand. Wallin stumbled back a few stops and lost his footing, ending up staggering backwards across the ring, onto the canvas. Another right hand to the head dropped Wallin again to close the final round. The judges' scorecards read 117–109, 114–112 and 116–110 for Chisora. Many felt the fight was not close. Fans took to social media to call out judge Bence Kovac of Hungary, for his 114–112 card. Had Chisora not scored the two knockdowns, his card would have been scored a draw, although the result would still have been an overall majority decision win for Chisora.

Wallin vs. Thomas Wallin regained some momentum after his recent loss, stopping Chris Thomas in the second round. The fight took place at the Tropicana Hotel and Casino in Atlantic City, New Jersey on 7 November 2025. The knockout occurred at the 1-minute mark. It was a left hand to the body that ended the fight. The fight marked Wallin's debut under new trainer Ronnie Shields.

Zuffa Boxing On 9 April 2026, Wallin announced that he had signed a promotional contract with Zuffa Boxing. He credited their busy calendar schedule as one of the reasons for joining them, as it would keep him more active and consistent. He called out fellow Zuffa heavyweight Efe Ajagba for a fight.

Wallin vs. Sirenko Wallin made his Zuffa Boxing debut against Vladyslav Sirenko at The Theater at Madison Square Garden in New York City, on 26 July 2026. He was knocked out in the last second of the 10th and final round. Wallin required medical attention in the ring and was taken back to the dressing rooms on a stretcher before being transported to hospital.

Personal life Wallin was born in Sundsvall, Sweden, but has lived in New York City since 2017. Wallin's father died of a sudden heart attack shortly before the announcement of Wallin's fight with Tyson Fury. Wallin said his father, an amateur boxer and part-time trainer, motivated him to get into boxing, and hoped to use his father's death as extra motivation to upset the odds and defeat Fury, similar to Buster Douglas's losing his mother before fighting Mike Tyson.

Professional boxing record

Pay-per-view bouts + No. Date Fight Country Network1 Tyson Fury vs. Otto Wallin BT Sport Box Office2Anthony Joshua vs. Otto Wallin TNT Sports Box Office DAZN