Akron native J.C. Tretter retires from NFL after eight seasons
Former Browns center, NFLPA president JC Tretter retires
Report: Browns trying to sign Packers OL J.C. Tretter
Playing or not, JC Tretter a true pro for Packers
JC Tretter '13 The ILR School
NFL Players Association elects Cleveland Browns' J.C. Tretter as
David Bakhtiari: Rising Green Bay Packers' left tackle
Packers to give JC Tretter first shot at center job - NBC Sports
Browns To Release J.C. Tretter
Gentle and patient' no longer, Aaron Rodgers gives rookie center