Alex Mack retires: Seven-time Pro Bowl center ends career after 13 seasons with Browns, Falcons and 49ers
Cleveland Browns: Alex Mack reportedly plans to retire - Dawgs By Nature
Alex Mack Announces Retirement From NFL After 13 Seasons
Alex Mack - San Francisco 49ers Center - ESPN
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NFL veteran center Alex Mack retires after 13 seasons, per report
Alex Mack News, Photos, Quotes, Video
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