JC Tretter, NFLPA president and former Browns center, retires after nine seasons
NFL says players' union leaders advised running backs to fake injuries
Inside the NFL turf debate: Injuries, safety measures, problems - ABC7 Los Angeles
Inside the NFL turf debate: Injuries, safety measures, problems - ABC7 Los Angeles
NFLPA president JC Tretter rips into the condition of Soldier Field and claims NFL must 'do better'
Former Browns center, NFLPA president JC Tretter retires
NFLPA calls for 'immediate replacement and ban' from slit-firm turf fields
NFLPA President JC Tretter Calls for Replacement, Ban of Slit-Film Turf Fields, News, Scores, Highlights, Stats, and Rumors
NFL offseason priorities for 2023: Possible rules changes, safety reforms - ESPN
NFLPA President JC Tretter Calls for Replacement, Ban of Slit-Film Turf Fields, News, Scores, Highlights, Stats, and Rumors
NFLPA president says 2022 season data proves natural grass is 'significantly safer surface' than turf
Biggest NFL controversies this season ahead of the Super Bowl
Former Browns C JC Tretter Announces Retirement, 'Doubling Down' In Role As NFLPA President - Steelers Depot
The NFL cast JC Tretter out; the NFLPA president says that only makes him more powerful - Sports Illustrated