J.C Tretter's role as NFLPA president becoming problematic for
Former Browns center, NFLPA president JC Tretter retires National
JC Tretter lobbies for all-virtual offseason as NFLPA president
JC Tretter Retires from NFL at 31; Former Packers, Browns Center
Former Browns C JC Tretter talks NFL working conditions
Official Diagnosis For Browns Rookie Offensive Lineman Revealed
Cleveland Browns J.C. Tretter Encourages NFL Players To Speak Out
Former Browns center JC Tretter announces retirement from NFL