"Not to defend him, he can play better. We expect him to, but so can everybody else," Nix said. "I mean, we all need to play better. ... I don't care who's getting paid what, none of us have earned it the last couple of weeks."
Williams, who was one of the NFL's top pass rushers during his six years in Houston, has been limited to 1 1/2 sacks this season. And the Bills' ability to generate a pass rush has dried up in each of the three losses. Nine of Buffalo's 10 sacks this season have come in the team's victories over Kansas City and Cleveland.
Nix said the defense has to change its mindset.
"It's refusing to lose, I'd put it that way, just being determined to compete," he said. "And some way or another, we're missing that."
Nix then turned his attention to defending Gailey, who's job status has suddenly come into question in his third season, and amid concerns that the Bills have quit on him the past two games. Nix noted how Gailey didn't lose his players in his first season after Buffalo opened with eight consecutive losses before closing 4-12.
"Chan has never lost it. He's even keel, he's the same every day. He's not going to panic," Nix said. "He knows what he's doing. And he won't lose this team, neither. We will get them back. I've got great confidence in that."
Nix also addressed quarterback Ryan Fitzpatrick's ongoing inconsistencies by saying they're a result of the team's overall poor performance.
Fitzpatrick has thrown 12 touchdown passes versus eight interceptions this season. His struggles date to last season. In going 3-11 in his past 14 games, Fitzpatrick has 22 touchdowns and 24 interceptions.
"We haven't been consistent enough at that position," Nix said. "But if you can't stop anybody, if you can't stop the run and get off the field on defense, and keep your offense in the game, then you've got no chance no matter who the quarterback is."
He then added that every position has become a concern, except for special teams.
"Other than that, we're concerned about everybody," Nix said. "We've got to do better."
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