JC Tretter's busy offseason centers on helping new teammates, players around NFL acclimate to unique circumstances
Former Browns, Packers center JC Tretter announces retirement after eight NFL seasons
JC Tretter Pushes For Guaranteed NFL Contracts To Become New Norm
Joel Bitonio wonders whether JC Tretter is being blackballed for his stance on player safety : r/nfl
The NFL cast JC Tretter out; the NFLPA president says that only makes him more powerful - Sports Illustrated
Browns C J.C. Tretter Re-Elected To Serve Second Two-Year Term As NFLPA President - Steelers Depot
The NFL cast JC Tretter out; the NFLPA president says that only makes him more powerful - Sports Illustrated
JC Tretter, former Cleveland Browns center, retires after 8 seasons in NFL but remains NFLPA president - ESPN
Why did JC Tretter retire? NFLPA president and former Browns, Packers center explains decision and how NFL may have influenced it
'On to the next chapter': Former Cleveland Browns center JC Tretter announces retirement