Cowboys All-Pro center Travis Frederick retires from NFL after 7 seasons
Retirement was the right move for Cowboys C Travis Frederick — and more athletes should consider following his lead
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Cowboys Center Travis Frederick Is Retiring, But His Impact Will Be Long Felt
Cowboys' 5X Pro Bowl C Travis Frederick Retires at 29 - D210SPORTS
Cowboys All-Pro center Travis Frederick retires
Cowboys a surprise Super Bowl contender with offensive line a key factor - The Washington Post
Dallas Cowboys' Travis Frederick Retires
Travis Frederick - NFL News, Rumors, & Updates
Dallas Cowboys: Travis Frederick retires from NFL at 29
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Travis Frederick, ex-Wisconsin lineman, retiring from Cowboys, NFL
Cowboys center Travis Frederick's retirement proof of ever-changing NFL - ESPN - Dallas Cowboys Blog- ESPN