Former Browns center JC Tretter retiring after 8 NFL seasons, will stay on as NFLPA president
Charger News: NFLPA's JC Tretter wants NFL to listen to medical experts - Bolts From The Blue
JC Tretter Re-Elected as NFLPA President
Why did JC Tretter retire? NFLPA president and former Browns, Packers center explains decision and how NFL may have influenced it
On Kareem Hunt's trade request; Jacoby Brissett vs. Jimmy Garoppolo; JC Tretter: Browns Insider
JC Tretter on his $32.5 million contract extension with the Browns
Cleveland Browns release JC Tretter
Tretter re-elected as NFLPA president
Browns C J.C. Tretter elected NFLPA president
Report: Browns, JC Tretter agree on 3-year contract extension
JC Tretter - Cleveland Browns Center - ESPN
Browns C Nick Harris works towards filling big shoes JC Tretter left behind
Browns' JC Tretter named new NFLPA president ahead of all-important CBA vote
Browns release JC Tretter, turning to Nick Harris at center
Browns release JC Tretter, union president