Anderson Silva vs Chael Sonnen

Lore & Background

Sonnen's trash talk before the fight included stating he was going to retire Silva. After the loss, urinalysis showed Sonnen had a testosterone/epitestosterone ratio of 16.9:1, leading to a suspension and fine by the California State Athletic Commission. Sonnen appealed, claiming he had hypogonadism and was undergoing testosterone replacement therapy, but Nevada State Athletic Commission Executive Director Keith Kizer denied ever approving Sonnen for TRT or speaking to him.

In Their Own Story

The MGM Grand Garden Arena hummed with a low, sustained roar that never quite broke into full noise—too many fans were holding their breath, waiting for the story to resolve. In the corner, Silva sat cross-legged, eyes half-closed, a calm that seemed almost theatrical given the chaos of the first two rounds. Sonnen's corner was a different world: shouting, slapping the canvas, feeding the fire. Then the bell for the fifth round rang, and the arena exhaled. Silva feinted a jab, slipped outside Sonnen's left, and let the big hook sail past his ear. For a heartbeat, nothing. Then the counter—a compact, vicious left hook that caught Sonnen flush on the jaw. The champion's eyes rolled. His knees buckled. He hit the canvas like a marionette with cut strings. Silva was on him in an instant, raining down short, controlled punches until the referee waved it off. The noise that erupted was not a cheer. It was a release. Two years of trash talk, of doubt, of "the old man can't do it anymore"—all of it dissolved into a single, thunderous, collective exhale from fifteen thousand people who had been holding the air in their lungs since the first round. Silva stood, raised his hands, and let the crowd have him. He did not celebrate. He simply nodded, as if confirming something he already knew.

Reader's Guide

The rivalry consisted of a single fight at UFC 117. A rematch was scheduled but cancelled after Sonnen's suspension. Sonnen's only light heavyweight title challenge occurred after his fights with Silva, not before.

Did You Know?

• Sonnen was ahead on all three judges' scorecards (40–34, 40–36, and 40–35) before being submitted in the fifth round.
• Sonnen later stated it was the choke, not the armbar, that made him tap out.
• Sonnen's T/E ratio of 16.9:1 was nearly 17 times that of a normal man and over four times the allowed maximum for an athlete on TRT.