HOUSTON — The Houston Texans signed three draft picks today and cleared roster space by releasing four players, including tackle Charles Spencer two years after a serious leg injury.

The Texans signed both third-round picks, cornerback Antwaun Molden and running back Steve Slaton, and their fifth-round choice, Frank Okam of Texas. Terms weren't released.

Molden, selected 79th out of Eastern Kentucky, finished his college career with three interceptions and three fumble recoveries.

Slaton, the third-leading rusher in West Virginia history despite leaving after his junior season, went to the Texans with the 89th pick. He set school records for career rushing touchdowns (50) and single-season rushing yards (1,774 in 2006).

Okam, the 151st pick, had 52 tackles and five sacks last year for the Longhorns. He had 160 tackles, 10 sacks and five fumble recoveries over four seasons.

Spencer hasn't played since breaking his leg early in the 2006 season.

The Texans also released fullback Jon Abbate, defensive tackle Eric Powell and guard Dan Stevenson.