GREEN BAY, Wis. — Mobile quarterbacks can force top pass rushers like the Packers’ Clay Matthews to make a tough choice.

Matthews can rush with his typical wild abandon at the risk of the letting the passer slip out of the pocket to extend a play or run for a gain. Or Matthews can hold his ground to limit the quarterback’s mobility, allowing more time in the pocket.

These are decisions that must be made on the fly Sunday when Green Bay tries to contain Seahawks run-pass threat Russell Wilson in the NFC title game in Seattle.

“You’ve got to have a feel for it. Obviously, you have to play this game for a little while as well as study offensive tendencies, and a little bit of that is luck, too,” said Matthews, holding a notebook and tablet computer in his hand before a defensive team meeting.

“You’ve got to understand when you can go and when you can’t,” Matthews said. “If you do go, you better make the play.”

BEARS: John Fox was hired as Chicago’s coach, four days after he and the Denver Broncos parted ways.

He was widely seen as a likely candidate to replace the fired Marc Trestman once he left the Broncos on Monday, given his record and his ties to consultant Ernie Accorsi and General Manager Ryan Pace.

Fox has a 119-89 regular-season record in 13 years with Carolina (2002-10) and Denver (2011-14), with six division titles and seven playoff appearances.

RAIDERS: The team is close to signing a one-year extension to remain at the Coliseum for the 2015 season.

Owner Mark Davis said an agreement has been reached and is awaiting formal approval from the city, county and NFL before the team can sign it.

The Raiders are searching for a long-term solution to their stadium situation as they look for a home to replace the dilapidated Coliseum. Davis reiterated that his first choice is getting a new stadium in Oakland, but he has talked to officials in San Antonio and is monitoring the stadium situation in Los Angeles.

PATRIOTS: The team issued a warning to fans buying tickets to the AFC championship game, saying that the Patriots’ ticket office and Ticketmaster are the only verified ticket sellers.

Patriots officials said four people have been arrested for selling counterfeit tickets to Sunday’s game.