Former Browns center JC Tretter retiring after 8 NFL seasons, will
JC Tretter, former Cleveland Browns center, retires after 8
Browns C J.C. Tretter Re-Elected To Serve Second Two-Year Term As
Browns center JC Tretter elected president of the NFLPA
A conversation with Browns' JC Tretter as new union chief in
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Sports Scandals, Plus NFLPA President J.C. Tretter - The Ringer
Browns: JC Tretter joined Freakonomics to talk NFL working conditions