The Chiefs placed starting C Rodney Hudson on injured reserve and signed OG Russ Hochstein and C Bryan Mattison.
Hudson, a second-year player, started the first three games of this season. He broke a bone in his left leg in Sunday's win over the Saints.
Hochstein has played in 138 games with 36 starts in his 10 NFL seasons. He most recently played for the Broncos and played in 15 games last season. Mattison has appeared in 15 games with four starts in two NFL seasons with the Rams and Ravens.