Alex Mack, Former Atlanta Falcons Center, Retires After 13 NFL
Report: 49ers C Alex Mack to retire after 13-year NFL career
Former Falcons center Alex Mack announces retirement
Reports: 49ers center Alex Mack retiring with Frank Gore; top pick
Pro Bowl center Alex Mack to retire from NFL after 13 seasons
Alex Mack looks forward to going back, sort of
Former Cleveland Browns QB Derek Anderson retires from National
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Falcons' Legendary Center to Retire: Report
Giants QB Alex Tanney, backup to Eli Manning and Daniel Jones
49ers Pro Bowl C Alex Mack retires after 13 seasons
Former Browns All-Pro center Alex Mack announces retirement after