PFF on Twitter: The Browns are releasing Center JC Tretter, per @AdamSchefter Tretter has recorded a Top-3 pass-blocking grade among centers in 4 straight seasons / Twitter
49ers news: CBS' Sports believes the 49ers should sign C J.C. Tretter before the season starts - Niners Nation
Browns lose starting center Harris for season, placed on IR
Browns center and NFLPA president JC Tretter's next fight: More natural grass
Browns release C J.C. Tretter - Dawgs By Nature
Browns release center JC Tretter to save $8.235 million on the salary cap and will start Nick Harris this season
Cleveland Browns Releasing Starting Center JC Tretter - Sports Illustrated Cincinnati Bengals News, Analysis and More
Cleveland's J.C. Tretter Elected President of N.F.L. Union - The New York Times
NFL players face 'long of hurdles' on returning, NFLPA president says
A conversation with Browns' JC Tretter as new union chief in turbulent times - The Athletic
Browns Reunion With Former Center JC Tretter Shut Down
The Browns Can No Longer Consider A Familiar Option At Center
JC Tretter announces his retirement - NBC Sports
NFLPA president, Browns center JC Tretter calls for CBA review
Browns Unlikely To Re-Sign C J.C. Tretter