Michael Crabtree is moving across the Bay area.

 The former San Francisco 49ers wide receiver agreed to a deal with the Oakland Raiders, he confirmed the deal on his Twitter account on Monday night.

ESPN reports the deal to be worth a base value of $3 million and up to $5 million in incentives.

Crabtree has struggled since suffering an Achilles injury in 2013 and had just 698 receiving yards in 2014, his lowest total in a season in which he played all 16 games.

The 27-year-old's best season came in 2012, when accounted for 1,105 receiving yards and nine touchdowns.

The move brings Crabtree to Oakland six years after the Raiders passed him over in the 2009 NFL Draft. The Raiders instead opted to draft receiver Darrius Heyward-Bey with the seventh-overall pick. Crabtree was taken three picks later by the 49ers.

According to TSN's Average Mock Draft Position, 93 per cent of mock drafts surveyed have the Raiders taking a wide receiver in the first round (57% Kevin White, 36% Amari Cooper).

The Raiders currently have James Jones, Rod Streater, Kenbrell Thompkins, Andre Holmes,Seth Roberts and Jeremy Gallon on the depth chart at receiver.

No Oakland receiver has had a 1,000 yard season since Randy Moss in 2005.