Demps averaged 6.5 tackles over the last seven games in 2007. He made a season-high 12 tackles at Tennessee on Dec. 2 and he forced and recovered a fumble the following week against Tampa Bay.
In six NFL seasons, Demps has played in 88 games with 70 starts. He has six career interceptions, seven forced fumbles and eight fumble recoveries.
The 6-foot-3, 257-pound Kalu played in 15 games last season, recording 13 tackles, including three sacks. His sack total was his highest since 2003, when he recorded 5.5 for Philadelphia. In two years with Houston, Kalu has played in 30 games with four starts and made 34 tackles, including five sacks.
Kalu has 31 sacks in 11 seasons. He first signed with the Texans as an unrestricted free agent in 2006.