Rex Ryan is switching teams — not divisions — after reaching an agreement to coach the Buffalo Bills.

A person familiar with the talks told the Associated Press the former New York Jets coach accepted in principle the Bills' contract offer after two days of discussions. The person spoke on the condition of anonymity because the Bills have not discussed their search to replace Doug Marrone, who stepped down abruptly Dec. 31.

The offer came a day after the Bills identified Ryan as a finalist and met with him for a second time in South Florida, where new owners Terry and Kim Pegula live. Ryan was one of 12 candidates to interview for the job since last weekend.

Ryan was chosen ahead of other notable candidates, including two-time Super Bowl winner Mike Shanahan, Cincinnati offensive coordinator Hue Jackson and former Bills backup quarterback Frank Reich, who completed his first season as San Diego's offensive coordinator.

At the same time, a second person familiar with the talks told the AP the Bills are negotiating to hire Greg Roman as offensive coordinator. Roman, a finalist for the Bills coaching job, spent the past four years as 49ers offensive coordinator.

Etc.

•Rookie wide receiver Paul Richardson will miss the rest of the playoffs for the Seahawks after suffering a torn anterior cruciate ligament in his left knee. The team confirmed Richardson's injury on Sunday night. Fox Sports first reported the injury. Richardson was injured in the second half of Seattle's 31-17 victory over Carolina in an NFC divisional playoff game Saturday.

•Dallas linebacker Rolando McClain left the Cowboys' playoff game against the Packers because of concussion symptoms. McClain got hurt in the middle of the first quarter during the Packers' first drive. He was ruled out for the game at halftime. McClain had cleared concussion tests and practiced Friday after missing the first two workouts of the week dealing with symptoms coming out of the win in the wild-card game over Detroit.

Gary Kubiak has decided to remain offensive coordinator of the Ravens rather than seek a job elsewhere as a head coach. Kubiak coached the Texans for eight years before joining the Ravens this season. He has been asked to interview for several head coach openings, but won't follow up.