The Chiefs needed to replace Tyson Jackson, a starting defensive end for the past five years. Jackson signed as a free agent with the Atlanta Falcons. The Chiefs had been shopping for a replacement and intended to visit with Red Bryant before he signed with Jacksonville.
The 6-foot-2, 305-pound Walker is a five-year NFL veteran. He spent his first four seasons with the Falcons, mostly as a backup. He moved last season to the Oakland Raiders and started 15 games with three sacks.
The Chiefs previously signed as free agents Houston linebacker Joe Mays and Indianapolis offensive lineman Jeff Linkenbach.