Former Browns center, NFLPA president JC Tretter retires
Postponement gives Browns practice, more time before Raiders
The NFL cast JC Tretter out; the NFLPA president says that only makes him more powerful - Sports Illustrated
In a Disrupted N.F.L., Teams Scramble to Adjust Their Routines - The New York Times
Position-by-position breakdown of Browns roster vs. Raiders
Browns JC Tretter faces old Packers teammates in Week 14 - Acme Packing Company
JC Tretter: NFL would've canceled Browns-Raiders game if not for union
NFL news: Raiders vs Browns game postponed until Monday - Silver And Black Pride