Cleveland Browns center and NFLPA president JC Tretter calls for discipline against Kansas City Chiefs assistant who shoved player - ESPN
JC Tretter tests positive for COVID-19
JC Tretter, former Cleveland Browns center, retires after 8 seasons in NFL but remains NFLPA president - ESPN
J.C. Tretter '13's path from ILR to the Cleveland Browns and NFLPA President
JC Tretter tests positive for COVID-19
JC Tretter - Cleveland Browns Center - ESPN
Browns release C JC Tretter
The NFL cast JC Tretter out; the NFLPA president says that only makes him more powerful - Sports Illustrated
A conversation with Browns' JC Tretter as new union chief in turbulent times - The Athletic