King Green admits being humbled by a real boxer

UFC lightweight King Green has admitted being humbled after sparring with WBO interim super lightweight champion Arnold Barboza Jr., a professional boxer who showed him what elite-level boxing technique looks like. Green had previously made headlines by outpointing professional boxer Bang Williams in sparring, even trash-talking under the watchful eye of four-division world champion Adrien Broner. Emboldened by that victory, Green issued an open challenge to all professional boxers.

Barboza answered and exposed significant gaps in Green's boxing defense. Rather than the slugfest Green expected, Barboza employed a disciplined guard and sharp footwork to pick apart the UFC fighter, though the sparring session remained cordial. Green later acknowledged the lesson: real professional boxing operates at a level beyond what he'd previously encountered in mixed martial arts sparring.

"I didn't know I was going with a real champion," Green said. "He socked the shit out of me." The 36–17 lightweight is riding a four-fight winning streak, including three finishes, and recently earned a first-round buzzer-beater stoppage over Terrance McKinney. Still, the experience against Barboza underlined the vast technical difference between MMA boxing and the elite professional ranks, a reminder that crossover sparring often exposes gaps in striking fundamentals.