ALLEN PARK, Mich. – For five years, Calvin Johnson has thrilled Detroit Lions fans, helping the city’s troubled NFL franchise recover from almost unimaginable depths to become one of the league’s most exciting young teams.

Now the Lions are rewarding the star receiver, giving “Megatron” a contract worthy of his catchy nickname.

Johnson signed an eight-year deal worth up to $132 million, the largest contract in NFL history. He had a year remaining on a deal he signed after being drafted in 2007, but this extension starts immediately and runs through the 2019 season.

“I’m so comfortable here now,” Johnson, 26, said at news conference Wednesday. “At first, not at all, but being here for five years, being around these people here in Detroit, teammates and just the city — I’m just growing accustomed to it.”

Johnson’s agent, Bus Cook, said the contract is worth $60 million guaranteed. That figure and the total value of the deal are NFL records.

“Calvin’s one of those guys — we’ve said this about a few guys that we have in our building – whatever they pay him is not enough,” Lions Coach Jim Schwartz said. “He’s truly a special player.”

After years of questionable drafts, the Lions finally began building a talented nucleus when they took Johnson with the No. 2 overall pick in 2007. Detroit went 0-16 in his second season but added quarterback Matthew Stafford with the top pick in 2009. The Lions then took defensive tackle Ndamukong Suh with the second pick the following year.

Detroit made the playoffs last season for the first time in a dozen years. The challenge now is keeping these stars long term, and the Lions took care of Johnson with minimal angst.

“They were happy to get this thing done with, and I was happy as well,” Johnson said. “It wasn’t a lot of confrontation. We weren’t butting heads or anything. It was just something that we knew needed to get done.”

The 6-foot-5 Johnson is a two-time Pro Bowler, and his 45 touchdowns receiving are the most in the NFL since 2008. His deal tops one given to receiver Larry Fitzgerald of Arizona last year — an eight-year deal that could pay him as much as $120 million.

RAMS-REDSKINS TRADE: New Rams General Manager Les Snead called it a nice coincidence that the team dealt the second pick of the draft before the beginning of free agency.

On Wednesday, the Rams and Redskins finalized the trade that showed the level of Washington’s desperation to make sure it can draft quarterback Robert Griffin III. The Redskins moved up four spots, sending their sixth overall pick and their second-rounder this year to the Rams, plus first-round picks in 2013 and 2014.

“This trade gives us flexibility and options that are unprecedented in Rams history,” Snead said.

The Redskins had to make sure they outbid the Browns, who could have offered the No. 4 and No. 22 selections in this year’s draft.

“With the interest other teams had in our first-round pick, we found ourselves in a unique situation,” Coach Jeff Fisher said. “This trade gives us a great opportunity to immediately upgrade our team through the draft and then sustain our team’s improvement with valuable picks in future drafts.”

EAGLES: DeSean Jackson agreed to a five-year contract worth $51 million, a person familiar with the negotiations told The Associated Press on condition of anonymity because terms weren’t officially announced.

The two-time Pro Bowl wide receiver already was tagged as the franchise player, meaning he would’ve earned at least $9.4 million next season. Now, he gets the long-term security he sought last year.

• Trent Cole, a two-time Pro Bowl defensive end, agreed on a four-year contract extension through 2017.

BUCCANEERS: Tampa Bay signed All-Pro guard Carl Nicks and cornerback Eric Wright to five-year contracts.

Nicks made the Pro Bowl the last two seasons for New Orleans. Wright, a five-year veteran, was with the Lions last season after spending four years in Cleveland.

CHIEFS: Kansas City signed former Cleveland running back Peyton Hillis, giving the team a formidable partner for Jamaal Charles.

COWBOYS: Former Chiefs cornerback Brandon Carr agreed to a five-year deal, and one of his Kansas City teammates, quarterback Kyle Orton, agreed to a three-year contract to be Tony Romo’s backup.

49ERS: Cornerback Carlos Rogers is staying in San Francisco, agreeing on a $31.3 million, four-year contract.

VIKINGS: Minnesota signed John Carlson to a five-year deal, bringing the tight end back to his home state.

Carlson spent his first four NFL seasons with Seattle.

COLTS: Indianapolis signed free-agent defensive end Cory Redding to help anchor the team’s conversion to a 3-4 defense. Terms of the deal were not released.

GIANTS: New York signed tight end Martellus Bennett, who spent the past four seasons with the Dallas Cowboys as the backup to Jason Witten.

DOLPHINS: A person familiar with the negotiations says nose tackle Paul Soliai has signed a $12 million, two-year contract to remain with the team.

CHARGERS: San Diego re-signed left tackle Jared Gaither to a four-year contract and also reached a four-year deal with former Ravens linebacker Jarret Johnson.

PANTHERS: Unrestricted free agent quarterback Derek Anderson said that he has agreed to a one-year contract to remain with Carolina. Anderson would not disclose the financial terms of the deal.

Anderson is expected again to backup Cam Newton, the offensive rookie of the year last season.

BEARS: Less than a day after Chicago traded for Brandon Marshall, reports surfaced that the Pro Bowl receiver has been accused in yet another off-field incident.

New York City police say a woman has filed a complaint alleging Marshall punched her in the face at a nightclub over the weekend. Marshall has not been charged in the incident, which the woman says occurred at 3:50 a.m. Sunday outside the Marquee in Manhattan’s Chelsea neighborhood.

Marshall was traded from the Miami Dolphins to the Bears on Tuesday for two third-round draft picks. Both teams said they knew about the alleged incident before the trade.

• The Bears agreed to a three-year contract with special-teams star Eric Weems, who spent his first five seasons with Atlanta.

BROWNS: Cleveland released guard Eric Steinbach, who missed last season following back surgery.

JAGUARS: Former Dallas wide receiver Laurent Robinson agreed to a five-year, $32.5 million contract that includes $14 million guaranteed.

JETS: New York re-signed kicker Nick Folk.