Browns release JC Tretter, union president
The NFL cast JC Tretter out; the NFLPA president says that only makes him more powerful - Sports Illustrated
Browns C J.C. Tretter elected NFLPA president
Why did JC Tretter retire? NFLPA president and former Browns, Packers center explains decision and how NFL may have influenced it
Tretter elected NFLPA president
Browns' Tretter calls for discipline against KC assistant
Trotter: Selection of new NFLPA leader raises questions about process - The Athletic
Former Browns center, NFLPA president JC Tretter retires –
NFL discusses cancellations for virus-affected games