On to the next chapter': Former Cleveland Browns center JC Tretter announces retirement
Veteran center and former Browns first-round pick Alex Mack retires
Banged-up Browns welcome RB Nick Chubb back to practice; QB Baker Mayfield (shoulder) absent
Players on 5 more NFL teams say no to in-person work, Pro Sports
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JC Tretter Retires From NFL After Nine-Year Career - Sports Illustrated
Former Browns center, NFLPA president JC Tretter retires –
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Former Browns Center JC Tretter Retires From NFL
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