Smith has made Pro Bowls in each of the past three seasons and emerged as one of the NFL's premier pass rushers, nearly winning Defensive Player of the Year in 2011. He's forced 14 career fumbles and had 72.5 career sacks.
Hampton's career has peaked, but the 2001 first-rounder is still effective. He's won two Super Bowls and made five Pro Bowls, the last coming in 2009. He has 350 career tackles with nine sacks and four forced fumbles.
Smith was one of the NFL's best pass rushers as a rookie in 2011. He didn't start a single game, yet came within a half sack of Jevon Kearse's rookie record for sacks, with 14 sacks. That broke the team record, and the Pro Football Writers of America named him the Defensive Rookie of the Year.
Newman's taken his fair share of knocks as a Cowboy before being released, but he made the Pro Bowl in 2007 and 2009 and has 32 career interceptions. The Wildcats' former Thorpe Award winner is moving on to the next phase in his career after an up and down career in Dallas.
Ross won two Super Bowls as a New York Giant, but he's moving on to warmer climates this offseason. He's made 200 career tackles and intercepted 10 passes in five seasons as a Giant before the former Thorpe Award winner signed a new deal with the Jags.
Thomas gives the Longhorns a third member of the All-Big 12 NFL secondary after a Pro Bowl season in his second year, 2011. Thomas was arguably the Seahawks' top defender and has seven career interceptions.