Former Browns center J.C. Tretter announces his retirement
J.C. Tretter, WELCOME TO RETIREMENT 👏
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Former Cleveland Browns Center JC Tretter, Retires After 8 Seasons
Former Browns center JC Tretter announces retirement from NFL
JC Tretter will have 18 more months as NFLPA president - NBC Sports
JC Tretter makes retirement decision amid blackball speculation
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Former Browns center JC Tretter retires, will stay on as NFLPA