Patriots sign Casey Walker off Panthers practice squad

The Patriots have signed defensive lineman Casey Walker off the Panthers practice squad, the team announced Saturday.

Walker has been on the Panthers practice squad off and on since joining the team as a rookie free agent in April 2013. He started 22 of his 33 games at Oklahoma, recording 49 tackles and one sack. Walker takes the roster spot of Sealver Siliga, who was placed on injured reserve Saturday.