Why did JC Tretter retire? NFLPA president and former Browns, Packers center explains decision and how NFL may have influenced it
PFF on Twitter: The Browns are releasing Center JC Tretter, per @AdamSchefter Tretter has recorded a Top-3 pass-blocking grade among centers in 4 straight seasons / Twitter
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Browns should seriously consider bringing back JC Tretter
Browns Unlikely To Re-Sign C J.C. Tretter
2017 Cleveland Browns, American Football Wiki
Cleveland Browns Release Center JC Tretter
Browns should seriously consider bringing back JC Tretter
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J.C. Tretter: Breaking News, Rumors & Highlights