Cowboys waived DE Cameron Sheffield. Sheffield appeared in one game with the Chiefs last season, a year after playing all 16 games for Kansas City. He and UDFA CB Devin Smith were cut to make room for two offensive linemen -- G Jeff Olson and T James Nelson.

Cowboys DL Cameron Sheffield will be sidelined a "couple of weeks" with a groin injury. A "couple of weeks" will likely doom Sheffield's roster chances. A 2010 fifth-rounder, Sheffield appeared in just one game for the Chiefs last season.

Chiefs waived LB Cameron Sheffield.

At Chiefs camp, Cam Sheffield is working as Andy Studebaker's replacement as an outside rusher in the nickel defense. Sheffield and Tamba Hali are the outside 'backers and Derrick Johnson stays in the middle. Justin Houston is also getting some looks at the nickel rusher spot, although the rookie has mostly been with the third team. Studebaker will only be a two-down linebacker, and Sheffield could end up with more sacks.