NFLPA president, Browns' JC Tretter tests positive for COVID-19
Former Browns C JC Tretter Announces Retirement, 'Doubling Down' In Role As NFLPA President - Steelers Depot
The NFL cast JC Tretter out; the NFLPA president says that only makes him more powerful - Sports Illustrated
Browns' C Tretter, Saints QBs test positive for COVID-19
Former Browns center, NFLPA president JC Tretter retires –
Cleveland's J.C. Tretter Elected President of N.F.L. Union - The New York Times
JC Tretter Stats, News and Video - C
Browns C J.C. Tretter elected NFLPA president
NFLPA president JC Tretter says 'hurdles' remain before NFL's return
Browns center J.C. Tretter, the new NFLPA president, assessing 'long list of hurdles' for players - ESPN
Browns center and union president JC Tretter wants COVID-19 testing to continue – Morning Journal
Browns C J.C. Tretter elected NFLPA president
A conversation with Browns' JC Tretter as new union chief in turbulent times - The Athletic