Former Browns Center JC Tretter Announces Retirement - Sports Illustrated Cleveland Browns News, Analysis and More
Browns release JC Tretter, union president
JC Tretter, former Cleveland Browns center, retires after 8 seasons in NFL but remains NFLPA president - ESPN
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J.C. Tretter, Cleveland Browns C, NFL and PFF stats
Browns release C J.C. Tretter - Dawgs By Nature
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JC Tretter, NFLPA president and former Browns center, retires after nine seasons
JC Tretter Retires From NFL After Nine-Year Career - Sports Illustrated
Get to know Nick Sirianni … and his ways of getting to know the Eagles - Sports Illustrated