NFL Players Association president calls for grass surfaces to be
Browns center, NFLPA president JC Tretter calls for end to NFL's
Browns: JC Tretter joins The Pat McAfee Show to discuss NFLPA business
Akron native J.C. Tretter retires from NFL after eight seasons
NFLPA calls on 6 venues to change playing surfaces
NFL labor vote being so close underscores split among players
J.C. Tretter announces retirement from football - Daily Norseman
NFLPA to reveal its own Players' All-Pro team as Tretter makes
JC Tretter Retires from NFL at 31; Former Packers, Browns Center
Browns center JC Tretter elected next NFLPA president
NFLPA president JC Tretter not happy with give-and-take with NFL