'On to the next chapter': Former Cleveland Browns center JC Tretter
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JC Tretter Retires from NFL at 31; Former Packers, Browns Center
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JC Tretter, NFLPA president and former Browns center, retires
Former Browns Center JC Tretter Announces Retirement - Sports
Former Browns center J.C. Tretter announces his retirement
Browns center and NFLPA president, JC Tretter, announces his
Browns center and NFLPA president, JC Tretter, announces his
JC Tretter announces retirement - BrownsZone with Scott Petrak