Browns center JC Tretter re-elected as NFLPA president for a second term
NFLPA president JC Tretter calls for turf ban amid rise of injuries
Broncos Briefs: Two veteran players push back on NFLPA president's call to eliminate offseason practices – The Denver Post
Rodgers, NFL players urge league to nix turf, go with grass
JC Tretter: NFL would've canceled Browns-Raiders game if not for union
10 questions with JC Tretter, who's led the NFLPA during 'unprecedented times'
Ravens Urged to Sign Ex-Browns, Packers Center JC Tretter
The NFL cast JC Tretter out; the NFLPA president says that only makes him more powerful - Sports Illustrated
How Cleveland Browns' JC Tretter handles NFLPA presidency in pandemic
Why is former Browns starter J.C. Tretter still unsigned?
For offseason workouts, NFL players negotiated directly with their coaches - The Boston Globe
Former Browns center, NFLPA president JC Tretter retires
Former Browns C JC Tretter Announces Retirement, 'Doubling Down' In Role As NFLPA President - Steelers Depot