The Raiders further bolstered their defense by signing veteran outside linebacker LaMarr Woodley to a two-year contract Thursday.

Woodley, 29, spent his first seven NFL seasons with the Pittsburgh Steelers, where he recorded 57 sacks and earned a reputation as one of the game's most versatile linebackers.

Earlier Thursday, the Raiders signed veteran defensive end Justin Tuck to a two-year contract. Tuck has the potential to earn as much as $11 million over the life of his contract. Woodley can earn as much as $12 million, according to an ESPN report.

Woodley played in a 3-4 defensive scheme his entire NFL career. The Raiders used primarily a 4-3 alignment the past two seasons under defensive coordinator Jason Tarver.

Given the Raiders return all three starting linebackers from last year's team — Kevin Burnett, Nick Roach and Sio Moore — it's unclear how the Raiders intend to use Woodley.

It's conceivable that the addition of Woodley means Tarver intends to switch to a 3-4 scheme or at least use that look more often than he did the past two seasons.