The Buffalo Bills have hired Kathryn Smith as quality control-special teams coach.

Smith is the NFL's first full-time coach.

The move comes less than a year after the Arizona Cardinals hired Jen Welter to serve as a training-camp assistant coach. 

"Kathryn Smith has done an outstanding job in the seven years that she has worked with our staff," Bills coach Rex Ryan said in a statement released by the team. "She certainly deserves this promotion based on her knowledge and strong commitment, just to name a couple of her outstanding qualities, and I just know she's going to do a great job serving in the role of quality control-special teams.

"I consulted with (Cardinals coach) Bruce Arians on this since he was really the first NFL head coach to make this kind of move when he hired a female linebackers coach through the summer," Ryan continued. "You can see the success some of these young ladies are having in the coaching profession, such as the young lady (Becky Hammon) that is an assistant to Coach (Greg) Popovich at the San Antonio Spurs, and realize how exciting this is for women like Kathryn Smith as well as the Bills organization."

According to the team's website, Smith served as an administrative assistant under Ryan this past season. She held the same role with Ryan in his final season as Jets coach in 2014. She also worked as a player personnel assistant with the Jets for seven years.

LeSean McCoy was asked for offer advice to the San Francisco 49ers' players on how to best adapt to Chip Kelly.

McCoy played for Kelly for two seasons with the Philadelphia Eagles before he was traded to the Buffalo Bills.

"Every situation is different," McCoy said. "The one thing I will say about Chip is that he wants to win. He's very, very intelligent. The offense, they'll find ways to get the big numbers. They'll find ways to put the stats up offensively. With him coming in there, no matter how good of a player or low player you are, if you just automatically believe him -- no matter if it sounds crazy, you're like what is he talking about -- if you just automatically believe and buy in, I think you'll be fine."

Percy Harvin spent the final 11 games of the 2015 season on injured reserve and is considering retirement.

Harvin's future with the Buffalo Bills is a mystery, even to the team.

"Percy Harvin was supposed to be a big help for us and we're still not sure what's going on," Jim Monos, the team's director of player personnel, told WGR-AM on Tuesday, per ESPN.com's Mike Rodak. "He's got to make some decisions here coming up. We need to get somebody opposite of (wideout) Sammy (Watkins) to be a real threat to that defense. I think that's a big key for our offense, to take one more step."

Cutting Harvin would cost the Bills $1 million in dead money both in 2016 and 2017.

Rex Ryan and the Buffalo Bills have hired Rob Ryan as assistant head coach for defense.

Rob Ryan was fired by the New Orleans Saints as defensive coordinator during the season.

"I'm excited to have Rob join our staff, and I think he will be a great asset for our defense," Rex Ryan said in a statement. "He has a tremendous working knowledge of our schemes, and I look forward to his input."

The Ryan brothers haven't worked together since 1995 with the Cardinals for their father Buddy Ryan.

The Buffalo Bills and Doug Whaley have agreed upon a contract extension.

Whaley was set to enter the final season of his contract as general manager of the Bills.

The Bills finished 8-8 and missed the playoffs for a 16th consecutive season.

Whaley became general manager of the Bills in 2013 to replace Buddy Nix.

The Seattle Seahawks finished the 2015 season ranked first in Football Outsiders' Total DVOA following their blowout victory of the Arizona Cardinals.

The Seahawks have now finished first in DVOA for four straight seasons, which is the first time the feat has been accomplished.

The Cincinnati Bengals rank second in Total DVOA ahead of the Cardinals, Carolina Panthers and Kansas City Chiefs.

These were also the five teams, the Seahawks, Bengals, Cardinals, Panthers and Chiefs, to finish the 2015 regular season in the top-10 in both Offensive and Defensive DVOA.

The Buffalo Bills will release Mario Williams in the offseason.

There is a "clear, fundamental disconnect" between  Rex Ryan and his defensive line and Williams might be at the heart of the trouble.

Williams has openly questioned his role as well as how other pass rushers are being used this season.