JC Tretter Retires From NFL After Nine-Year Career - Sports Illustrated
Browns C J.C. Tretter Re-Elected To Serve Second Two-Year Term As NFLPA President - Steelers Depot
Browns center and NFLPA president, JC Tretter, announces his retirement from the NFL
J.C. Tretter, former Browns center and NFLPA president, retires from NFL - The Athletic
Browns: JC Tretter joins The Pat McAfee Show to discuss NFLPA business
Joel Bitonio wonders whether JC Tretter is being blackballed for his stance on player safety : r/nfl
J.C. Tretter net worth: How much did ex-NFL star earn in salary and contract?
NFLPA president: CBA 'no' vote would've meant different world for players
Browns center JC Tretter elected to second term as NFLPA president
Browns center JC Tretter and Seahawks linebacker Shaquem Griffin announce retirement