Dirk Koetter is confident the Tampa Bay Buccaneers are on the verge of becoming relevant again.

The longtime NFL assistant became the team's fifth coach in eight years Friday, assuming the task of transforming a team that has finished last in its division five consecutive seasons into playoff contenders.

Koetter, an offensive coordinator for three clubs over the past nine years, succeeds Lovie Smith, who was fired last week after going 8-24 in two seasons.

"It's one of the happiest days of my life but also one of the most humbling. Long time in the making," he said.

"I know I can do the job, even though I'm whimpering around up here a little bit. … I'm ready it."

Cardinals offensive coordinator Harold Goodwin and Panthers defensive coordinator Sean McDermott also interviewed for the job.

Koetter led top-10 offenses in Jacksonville and Atlanta before moving to the Bucs. While this is his first opportunity as an NFL head coach, the 56-year-old was head coach at Boise State from 1998-2000 and at Arizona State from 2001-06.

Brown won't play

Steelers All-Pro receiver Antonio Brown will miss the AFC divisional-round game against the Broncos on Sunday because of a concussion.

Brown, who was concussed late in the fourth quarter of the Steelers' 18-16 victory against Cincinnati on Saturday night, did not practice Wednesday or Thursday.

The Steelers were holding out hope that he would be able to practice Friday and play, but Brown did not pass the NFL concussion protocol.

•Steelers quarterback Ben Roethlisberger (sprained right shoulder) threw in practice on Friday but remains questionable for Sunday's AFC divisional playoff game against Denver.

•Steelers running back DeAngelo Williams, who missed the Bengals game because of a right foot injury, has not practiced and is not expected to play in Denver.

NFL fines four

The NFL fined four players and two coaches a total of $83,665 for their actions in the Pittsburgh-Cincinnati wild-card game.

The largest fines went to Bengals cornerback Adam "Pac-Man" Jones, $28,940 for contact with an official, and Steelers guard Ramon Foster, $17,363 for unnecessary roughness.

Bengals players Wallace Gilberry (unsportsmanlike conduct) and Domata Peko (unnecessary roughness) were each fined $8,681.

Etc.

Jim Caldwell is coming back for a third season as Lions coach. Caldwell is 18-15, including making the playoffs last year with the Lions.

•Broncos defensive end Derek Wolfe received a four-year contract extension worth $36.7 million.

•The Seahawks listed running back Marshawn Lynch (abdominal surgery) as probable on their final injury report for Sunday's NFC playoff game at Carolina.

•Panthers receiver Ted Ginn Jr. (knee) was added to the team's injury report as questionable for Sunday's game.