Sean McDermott went down fighting for Buffalo, both at the postgame lectern in the Mile High City and from 35,000 feet on the flight home, insisting that it was a catch and the Bills should be the ones moving on. Denver coach Sean Payton, however, contends the Broncos’ 33-30 overtime divisional playoff victory should have ended on a safety eight snaps earlier, in which case Bo Nix wouldn’t have broken his ankle on Denver’s winning drive. Brandin Cooks had a step on his defender and was hauling