Rex Ryan has agreed to a five-year deal to become the next head coach of the Buffalo Bills.

According to multiple reports, the deal was agreed to in principle on Sunday and finalized later in the day.

CBSSports.com reported Ryan had begun assembling a coaching staff and that San Francisco 49ers offensive coordinator Greg Roman will be his first hire and would work in the same capacity with the Bills. Roman and Ryan worked together with the Baltimore Ravens.

Ryan, 52, will earn a salary of $5.5 million per year, according to ESPN, and complete an extensive coaching search for the Bills, who have interviewed 12 candidates since Doug Marrone opted out of his contract on Dec. 31.

The Bills would like to keep Jim Schwartz as defensive coordinator. The defense ranked fourth in the NFL and had a league-leading 54 sacks in 2014.

–The Atlanta Falcons reportedly have narrowed their head-coaching search to Arizona Cardinals defensive coordinator Todd Bowles and Seattle Seahawks defensive coordinator Dan Quinn.

Ian Rapoport of NFL Network reported that the Falcons prefer to hire a defensive-minded coach.

Bowles, 51, had a five-hour interview with the Falcons on Saturday, a league source told ESPN.

–The Chicago Bears plan to pursue Baltimore Ravens offensive coordinator Gary Kubiak for their head-coaching vacancy, according to a report Sunday.

Sources told ESPN’s Adam Schefter that the Bears also have an interest in Seattle defensive coordinator Dan Quinn for the job.

–The New York Jets are expected to hire Houston Texans scouting director Mike Maccagnan as the team’s general manager, according to reports.

Ian Rapoport of NFL Network reported that Maccagnan, who has been Houston’s director of college scouting since 2012, likely will replace John Idzik, who was fired after two seasons as the Jets’ general manager.

–Substitutions by the New England Patriots questioned by Baltimore Ravens coach John Harbaugh on Saturday were within the rule book.

Former NFL director of officials Mike Pereira said the moves were “perfectly legal” even if they caused confusion on the Ravens’ sideline.

Patriots running back Shane Vereen reported as an ineligible player and lined up in the slot for the Patriots.

New England ran three plays that declared a receiver ineligible. The confusion helped the Patriots to a touchdown.

“It’s a substitution type or a trick type of a thing,” Harbaugh said after the Ravens’ 35-31 loss. “So they don’t give you the opportunity, they don’t give you the chance to make the proper substitutions and things like that.”

–Seattle Seahawks rookie wide receiver Paul Richardson, the team’s top draft choice as a second-round pick, is likely out for the NFC Championship game with a torn anterior cruciate ligament in his left knee.

Richardson hurt his left knee while leaping for a deep pass in the third quarter Saturday against the Carolina Panthers.

–Dallas Cowboys quarterback Tony Romo tore ligaments in his right ring finger in Sunday’s NFC divisional playoff loss to the Green Bay Packers, according to a tweet from the Dallas Morning News’ Rainer Sabin.

Romo, who did not miss any time in the game, finished the game 15 of 19 for 191 yards with two touchdowns and no interceptions.

Cowboys linebacker Rolando McClain left Sunday’s game in the first quarter because of head injury and did not return because of concussion-like symptoms.

–Baltimore Ravens wide receiver Steve Smith apparently will not retire yet, saying he plans to play in 2015.

After the Ravens’ loss to the New England Patriots in Saturday’s AFC divisional playoff game, Smith, who turns 36 on May 12, posted an Instagram suggesting he will return for a 15th NFL season.

“It was a GREAT season this old man played for you and my teammates,” Smith wrote in his Instagram post. “I’ve enjoyed every moment and couldn’t have asked for a better fan base. Look forward to a better season next year and watch us go WIN IT ALL.”

–Indianapolis Colts running back Trent Richardson was inactive for Sunday’s divisional playoff game against the Broncos.

Denver’s leading tackler linebacker Brandon Marshall was active for the Broncos after being limited in practice all week.

The Colts traded a first-round pick for Richardson but he has fallen behind Daniel Herron and Zurlon Tipton on the depth chart, which could signal the end of his tenure with the team.

–Carolina Panthers defensive end Greg Hardy’s domestic violence trial has been scheduled for Feb. 9, ESPN.com reported.

Hardy was arrested in May on charges of assaulting and threatening his former girlfriend during a dispute at his apartment.

–The NFL announced at least two of the three regular-season games scheduled to be played in London’s Wembley Stadium next season will feature a 9:30 a.m. ET kickoff time.

The Jets and Dolphins will play at 1:30 p.m. London time on Oct. 4, and the Bills and Jaguars will have the same kickoff time three weeks later. The league has not announced the starting time for the Nov. 1 game between the Lions and Chiefs.