The Redskins have signed linebacker Jeff Posey, offensive lineman Spencer Folau and running back A.J. Harris, the team announced on Tuesday.
To make room for the three new players, the Redskins waived linebacker Chris Clemons, running back Kerry Carter and defensive back Ben Emanuel with injury settlements.
Clemons and Carter both suffered serious knee ligament injuries in last Sunday's preseason opener against Cincinnati. Clemons would have been sidelined 4-6 weeks and Carter would have been forced to miss the entire season.
Posey, 6-4 and 241 pounds, is an eight-year NFL veteran who began his career with the San Francisco 49ers as an undrafted free agent in 1997.
Posey spent the past three seasons with the Buffalo Bills under current Redskins cornerbacks coach and former Bills defensive coordinator Jerry Gray.
Regarded as a strong, hold-the-point-of-attack linebacker, Posey served as the starting strong-side linebacker for the Bills the last three seasons. He was playing at the weak-side linebacker position until the Bills released him on Aug. 7, 2006.
Posey, who played his college ball at Southern Mississippi, has appeared in 123 games with 76 starts and totaled 357 tackles (221 solo), 20.5 sacks, two interceptions and eight forced fumbles.
In 2005, Posey appeared in 16 games with 15 starts for the Bills and recorded 68 tackles (47 solo), three sacks and eight pressures.
Folau, 6-5 and 310 pounds, is an eight-year NFL veteran who has spent time on the rosters of Baltimore, Miami and, most recently, New Orleans.
Folau, who played his college ball at Idaho, has appeared in 91 career NFL games with 43 starts.
Folau was waived by the Saints in August 2005 and spent last season out of football. He will add depth to an offensive line corps that has a collection of young, inexperienced backups.
Harris, 6-1 and 230 pounds, is a first-year player who appeared in 43 games during his career at Northern Illinois.
During his college career, Harris rushed for 1,687 yards on 342 carries and recorded 12 touchdowns. He also recorded 31 catches for 197 receiving yards.
Harris was a try-out for the Redskins during their 2006 rookie camp at Redskins Park.