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The Pittsburgh Post-Gazette reported Monday that Antonio Brown‘s dispute with a teammate led him to walk out last week. We now know the name of that player: Ben Roethlisberger.

Mark Kaboly of The Athletic reports that it was the Steelers quarterback who had a football thrown at his feet by an angry Brown. The disagreement between Roethlisberger and Brown occurred at a Wednesday walk-through.

Brown did not practice last week, with the Steelers listing him as a “coach’s decision” Wednesday and with a knee injury on Thursday and Friday.

The Pro Bowl receiver did not play in the game for disciplinary reasons not an injury concern, according to the Post-Gazette.