Their once-promising season may be teetering, but the Raiders have succeeded in their trial balloon with wide receiver Michael Crabtree.

Reborn in Oakland after a turbulent ending with the 49ers, Crabtree was rewarded Wednesday with a four-year contract extension.

ESPN first reported the deal. NFL Network said it is worth $35 million, with almost $19 million guaranteed.

Crabtree signed a one-year deal that was worth $3.2 million after failing to land the long-term contract he was seeking as an unrestricted free agent. The move paid off for both sides as Crabtree is on pace for career highs in catches, yards receiving and touchdowns. He has 66 receptions for 760 yards and seven touchdowns.