The move announced Sunday gives the Raiders more depth at outside linebacker with Jon Alston nursing a foot injury and Ricky Brown competing with Kirk Morrison for the starting middle linebacker spot.
Greenwood saw his production and playing time decrease last season in Houston and was released in February. He started 10 games and finished with 31 solo tackles last season.
Prior to last season, Greenwood started at weakside linebacker for the Texans for 4 years, racking up over 100 tackles in each season. Oddly enough though, Texans fans seemed glad that Greenwood was no longer on the field. Greenwood provides more depth at both OLB positions, mainly WLB.