JC Tretter Retires From NFL After Nine-Year Career - Sports Illustrated
Former Browns center J.C. Tretter announces his retirement
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JC Tretter: Union pushed for postponements to get players paid after NFL wanted to cancel games
Browns sign C JC Tretter to contract extension
Cleveland Browns release center JC Tretter, save $8.25 million against salary cap - ESPN
Cleveland Browns: JC Tretter retires from the NFL - Dawgs By Nature
Browns release C JC Tretter
Browns release JC Tretter, turning to Nick Harris at center
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Browns release C J.C. Tretter - Dawgs By Nature
Saturday tags Bengals in tweet after Browns release center JC Tretter
Should Packers consider signing JC Tretter?