Madison Square Garden has hosted countless historic combat sports moments, and at UFC 334 Stephen “Wonderboy” Thompson added one final chapter to his legendary career. Stepping into the Octagon at 43 years old for his official retirement bout, the two-time welterweight title challenger turned back the clock to score a clinical third-round knockout over Charles Radtke.

IT DOESN'T GET ANY BETTER THAN THAT 🔥🔥🤯👏👏

Stephen Thompson wonder kick KO. In slow motion ‼️‼️

Chuck Buffalo did the chicken dance#UFC334 pic.twitter.com/5gVB01IiJV

— FightLuck (@FightluckBet) November 15, 2026

From the opening bell, the tactical battle centered on range control and cage positioning. Radtke entered looking to crowd Thompson’s kicking space, clinch along the fence and drag the karate stylist to the mat. While “Chuck Buffalo” managed to secure two takedowns across seven attempts, he struggled to consolidate control or generate meaningful offense. Every time the fight returned to open space, Thompson’s bladed stance, lateral footwork and three-inch reach advantage completely neutralized Radtke’s forward pressure.

By the second frame, Thompson’s volume and precision began breaking down his 36-year-old opponent. Operating cleanly from the outside, Thompson outlanded Radtke 67 to 11 in significant strikes while connecting at a sharp 55% clip. Radtke swung hard in the pocket but found mostly air, landing just 27% of his significant attempts as Thompson repeatedly punished his entries with crisp counters.

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Entering the third round firmly ahead, Thompson refused to coast toward a decision. Sensing Radtke slowing down after absorbing sustained damage, Wonderboy uncorked the decisive third-round knockdown and knockout blow to bring the New York crowd to its feet.

Improving to 18-9-1 before laying down his gloves, Thompson leaves MMA as one of its purest striking innovators. At UFC 334 he proved his signature movement, timing and poise remained elite until the very last second.