JC Tretter Announces Retirement After Nine Seasons in the NFL - video Dailymotion
Former Browns, Packers center JC Tretter announces retirement after eight NFL seasons
Browns center JC Tretter described as 'Alex Mack-esque'
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JC Tretter announces retirement - BrownsZone with Scott Petrak
Former Browns center JC Tretter retiring after 8 NFL seasons, will stay on as NFLPA president
JC Tretter will have 18 more months as NFLPA president - NBC Sports
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