Should signing J.C. Tretter be the Ravens' next move? - Baltimore Beatdown
Former Cleveland Browns Center JC Tretter, Retires After 8 Seasons In NFL
JC Tretter will remain as the NFLPA president for another 2-year term
Cleveland Browns News: J.C. Tretter helping educate about CBA
Notes: Center JC Tretter says he'd love to get contract extension, stay in Cleveland - BrownsZone with Scott Petrak
JC Tretter Retires From NFL After Nine-Year Career - Sports Illustrated
JC Tretter had interest in Dallas Cowboys and Minnesota Vikings, believes NFLPA role led to cold free agent market
Browns center and NFLPA president JC Tretter's next fight: More natural grass
J.C. Tretter hints that role with NFLPA created turmoil with Browns
Cleveland's J.C. Tretter Elected President of N.F.L. Union - The New York Times
Browns Unlikely To Re-Sign C J.C. Tretter
Cleveland Browns: JC Tretter retires from the NFL - Dawgs By Nature
The Browns Can No Longer Consider A Familiar Option At Center