Posted by ESPN.com’s Bill Williamson
There were several transactions involving the AFC West on Sunday.
He started seven games for the Patriots in his career and new Kansas City general manager Scott Pioli was an executive with the Patriots during O’Callaghan’s New England tenure.
O'Callaghan has a chance to start with the Chiefs. In addition to Richardson, the Chiefs cut former starter Damion McIntosh on Friday.
Also in the AFC West: