Browns release center JC Tretter
Browns release JC Tretter, turning to Nick Harris at center
Former Cleveland Browns C JC Tretter retires
J.C. Tretter '13's path from ILR to the Cleveland Browns and NFLPA President
Notes: Center JC Tretter says he'd love to get contract extension, stay in Cleveland - BrownsZone with Scott Petrak
A conversation with Browns' JC Tretter as new union chief in turbulent times - The Athletic
The Browns are releasing center JC Tretter
JC Tretter announces his retirement - NBC Sports
Browns release center JC Tretter to save $8.235 million on the salary cap and will start Nick Harris this season
Former Packers center, NFLPA president JC Tretter retires