Dallas Cowboys center Travis Frederick out indefinitely after Guillain-Barre syndrome diagnosis, NFL News
Cowboys center Travis Frederick announces retirement
Jones: From personal experience, Travis Frederick's Guillain-Barre diagnosis is scary, but there's hope - The Athletic
Travis Frederick feels very good about playing in 2019 - NBC Sports
Retired Cowboy Frederick lines up to take on his biggest opponent yet
Former Big Foot star Travis Frederick retires from the NFL
Cowboys C Travis Frederick Provides Update on Recovery, 2019 Return ✭ Inside The Star
Travis Frederick Career Highlights
Cowboys Offensive Lineman Travis Frederick Who Missed 2018 Season Due To Illness Is Expected Back In Camp - CBS Texas
Dallas Cowboys center Travis Frederick has neurological disorder
Dallas Cowboys' Travis Frederick Retires
Hey, it's good to be back home again –
GOING DEEP–BEYOND THE HUDDLE: Dallas Cowboys center Travis Frederick answers your questions, True-Blue special feature
Former Cowboys star Travis Frederick addresses retirement, chance of NFL return - On3