The 23-year-old Iranian striker earned a $100,000 contract with ONE Championship after knocking out Jo Nattawut at A Friday Fights 137 on Friday, December 19 at Lumpinee Stadium in Bangkok. The second-lap finish capped a journey that began with raw power and ended with calculated violence.
Siasarani opened his ONE Friday Fights campaign in January 2023 against Avatar PK Saenchai. He absorbed the punishment, walked through the fire and achieved a majority decision. The performance showed heart, but lacked polish. That changed over time.
The Team Mehdi Zatout product switched to kickboxing four months later against Moroccan star Mohammed Boutasaa. He deliberately dropped his guard to draw out the counters before landing heavier shots in return. The unanimous decision surprised people who thought he was just tough. He proved that he could think too.
Mohammad Siasarani built a contract through victories over the elite
The momentum carried over into Muay Thai against Mohammad Satanfah Sitsongpeenong in July. Siasarani was dropped in the first round, but immediately responded with his own knockdown. He then applied pressure and finished the Thai striker with punches before the round ended. The finish marked his evolution from survivor to killer.
His upset of legendary striker Sitthichai Sitsongpeenong in September cemented his reputation. He dropped the Thai icon in the second round and controlled the pace to reach a unanimous decision. The victory capped off a perfect 2023 campaign.
But 2024 brought reality checks. Shadow Singha Mawynn assaulted him with a liver shot in September. Khunsuek dropped him with a head kick two months later. Back-to-back unanimous decision losses exposed weaknesses that needed to be addressed.
Siasarani answered those lessons in 2025. He defeated the rising Liu Mengyang via split decision in April, handing the Chinese striker his only ONE championship loss. He then defeated Japanese debutant Kaito Ono and Polish fighter Oskar Siegert to snap a three-fight winning streak.
Nattawut’s knockout sealed everything. A clean one-two combination saw the former world title challenger’s lights go out in round two. The finish showed patience combined with strength. Rough toughness turned into precise finishing ability earned Siasarani his place on the main roster.
Mohammad Siasarani now has a 7-2 ONE Championship record and a four-fight winning streak on the world stage.
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