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Otto “All In” Wallin is a Swedish southpaw from Sundsvall who turned professional in 2013. His most famous performance came against Tyson Fury in Las Vegas in September 2019, when a legal punch opened a deep cut above Fury’s right eye. Wallin kept competing through twelve rounds, but Fury won by unanimous decision.
Wallin beat Dominic Breazeale over twelve rounds in Connecticut in February 2021. A split-decision victory over Murat Gassiev in Antalya in September 2023 earned the regional WBA Intercontinental belt.
Anthony Joshua stopped him after five rounds in Riyadh that December. Wallin returned with a first-round knockout of Onoriode Ehwarieme in July 2024, before Derek Chisora dropped him twice and won their February 2025 fight by unanimous decision.
Vladyslav Sirenko knocked Wallin out at 2:59 of the tenth and final round in New York on July 26, 2026. Wallin is 28–4 (16 KOs), with a separate no-contest. No next fight has been announced.
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