Cowboys' offseason gets even worse with All-Pro lineman Travis Frederick's surprise retirement
Dallas Cowboys place Travis Frederick, Terrance Williams on injured reserve - ESPN
Cowboys center Travis Frederick abruptly announced his retirement
Travis Frederick - Wikipedia
Cowboys Rumors: Latest Buzz on Replacing Travis Frederick, Ndamukong Suh, More, News, Scores, Highlights, Stats, and Rumors
Possible replacements for retired Cowboys center Travis Frederic
With Frederick Retiring, Who's Cowboys 'Next Man Up' at Center? - FanNation Dallas Cowboys News, Analysis and More
Dallas Cowboys: Travis Frederick retires from NFL at 29
Cowboys' Travis Frederick Announces Retirement at 29; Played 7 NFL Seasons, News, Scores, Highlights, Stats, and Rumors
A Key Injury Update From Connor Williams