The Oakland Raiders aren't wasting any time in solidifying the future of their passing game.

Oakland and wide receiver Michael Crabtree have agreed to a contract extension.

"This is where I belong," Crabtree said as he signed the deal on Wednesday night.

The contract is for four years and worth $35 million, with nearly $19 million in guarantees, according to Ian Rapoport of NFL Network

Now healthy after working through injuries toward the end of his time with the San Francisco 49ers, Crabtree was quick to re-emerge as a productive wideout upon signing a one-year deal with the Raiders last offseason.

He's appeared in each of the Raiders' 12 games this season, recording 66 receptions for 760 yards and seven touchdowns.

Crabtree's production puts him on pace for career highs in both receptions and touchdowns, but his locker-room impact appears to have been a factor in the team's desire to pursue a long-term deal. Citing team sources, Caplan adds the seven-year veteran has made an impression with both his leadership and competitiveness.

Locking him up well in advance of the 2016 offseason was the sensible strategy for the Raiders, as the strong season would have resulted in a number of teams being interested.

Along with standout rookies Amari Cooper and Clive Walford, Crabtree's presence will give quarterback Derek Carr a strong group of pass-catchers to work with for years to come.