JC Tretter announces retirement - BrownsZone with Scott Petrak
5-year Browns center JC Tretter announces retirement
NFLPA Archives - Steelers Depot
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Former Browns center JC Tretter announces retirement from NFL
Novak Djokovic to Play at U.S. Open After COVID-19 Policy Change – SportsTravel
The Washington Post December 09, 2020 PDF, PDF, Joe Biden
On to the next chapter': Former Cleveland Browns center JC Tretter announces retirement
Cleveland Browns' JC Tretter re-elected as NFLPA president
Cleveland Browns' JC Tretter re-elected as NFLPA president
JC Tretter, former Cleveland Browns center, retires after 8 seasons in NFL but remains NFLPA president - ESPN
Former Browns, Packers center JC Tretter announces retirement after eight NFL seasons