7-time Pro Bowl C Alex Mack retires after 13 years in NFL
JC Tretter Announces Retirement
Why did JC Tretter retire? NFLPA president and former Browns, Packers center explains decision and how NFL may have influenced it
PFF on X: JC Tretter has announced his retirement after eight seasons. 83.2 grade since 2020 (4th among centers) 👏 / X
J. C. Tretter - Game Time with Boomer Esiason
Former Browns center J.C. Tretter announces his retirement
Vikings' O'Connell Says He Never Spoke With JC Tretter About Roster Spot - Sports Illustrated
JC Tretter, former Cleveland Browns center, retires after 8 seasons in NFL but remains NFLPA president - ESPN