ALLEN PARK, Mich. — Matthew Stafford is in line to sign a contract extension that will set up his newborn twins for life.

The quarterback said “his people,” are talking to the Detroit Lions’ “people,” and he hopes they can agree on a long-term deal that’s good for his growing family and the team.

Stafford is entering the last season of his $53 million, three-year contract. He might be able to get more than the $140 million, six-year deal Andrew Luck signed last year with the Indianapolis Colts.

And it doesn’t sound as if the 29-year-old Stafford is willing to give Detroit a discount to help the franchise have more money to spend on other players.

“Every year, teams find ways to put good teams around good quarterbacks.” Stafford said Tuesday following a workout with teammates. “You see it every year. I’m not too worried about that. I know that the salary caps and all that kind of stuff is malleable as you want it to be. I think you just go and try and make a good decision for not only the player, but the team.”

Stafford’s team at home in suburban Detroit grew by two on March 31 when his wife, Kelly, gave birth to twin daughters, Chandler and Sawyer.

49ERS: Offensive lineman Garry Gilliam is joining the San Francisco 49ers after Seattle declined to match his restricted free-agent tender.

RAIDERS: Oakland released defensive tackle Dan Williams after two seasons with the team.

JAGUARS: Linebacker Paul Posluszny is switching positions for the first time in his NFL career, and he doesn’t seem totally comfortable with the decision.

Posluszny said new coach Doug Marrone is moving him from middle linebacker – the spot he’s played since peewee football – to strong-side linebacker. It’s a tricky transition that will require Posluszny, who is entering his 11th season, to play near the line of scrimmage and in coverage more often.

PACKERS: Linebacker A.J. Hawk announced he will retire as a member of the Green Bay Packers after 11 NFL seasons.

“The first thing that needs to be said about A.J. Hawk is that he is a good man,” GM Ted Thompson said. “He was a terrific teammate and a true professional during his career.”

The 2006 draft pick out of Ohio State ranks first in franchise history with 1,118 career tackles. Hawk played in 142 of a possible 144 regular-season games with Green Bay, appearing in all 16 contests in eight of his nine seasons. He played one season with Cincinnati and appeared in one game for Atlanta last year. The Packers said his 158 games played from 2006-15 were the most among NFL linebackers over that span, and he led Green Bay in tackles five times during his career (2006, 2008, 2010, 2012-13), tied with Nick Barnett for most in team history.