Getty Former Cleveland Browns quarterback PJ Walker has retired. Former Cleveland Browns quarterback P.J. Walker has officially called it a career. The Calgary Stampeders announced Thursday that Walker, 31, informed the team he is stepping away from football after nine professional seasons. Walker’s agent confirmed the retirement . “The Stampeders have been informed by QB P.J. Walker that he has decided to step away from football after nine years of playing professionally,” the Stampeders wrote