The NFL cast JC Tretter out; the NFLPA president says that only makes him more powerful - Sports Illustrated
JC Tretter, former Cleveland Browns center, retires after 8 seasons in NFL but remains NFLPA president - ESPN
Former Browns C JC Tretter Announces Retirement, 'Doubling Down' In Role As NFLPA President - Steelers Depot
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JC Tretter announces retirement - BrownsZone with Scott Petrak
JC Tretter Retires from NFL at 31; Former Packers, Browns Center Is NFLPA President, News, Scores, Highlights, Stats, and Rumors
J.C. Tretter announces retirement from football - Daily Norseman
Dov Kleiman on Twitter: Former #Browns, #Packers Center JC Tretter announces his retirement from the NFL. He also served as the NFLPA president. / X
Former Browns Center JC Tretter Retires From NFL
Former Browns center JC Tretter announces retirement from NFL
J.C. Tretter, former Browns center and NFLPA president, retires from NFL - The Athletic
Browns center and NFLPA president, JC Tretter, announces his retirement from the NFL