He pulled himself out of the game.
Davis wandered away from the Chargers game at halftime after strongly disliking what he saw (and participated in), but did his best to clear things up in the aftermath.
In a statement released by Davis, the 30-year-old said football has taken a toll on his body, and he'd prefer to "walk away healthy" than "limp away too late".
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Davis' impromptu retirement caught many of his teammates and fans off-guard.
Bills linebacker Lorenzo Alexander said he had never seen anything like it before.
He also expressed that he meant no disrespect to his teammates and coaches by abruptly retiring. But today on the field, reality hit me fast and hard: "I shouldn't be out there anymore", the statement read. "He said he's not coming out".
"While I was on the field, I just didn't feel right and I told the coaches 'I'm not feeling like myself, '" Davis said. The Bills were down 28-6 at the time, so some frustrations may well have boiled over, but this goes above and beyond mere frustration.