Veteran center and former Browns first-round pick Alex Mack retires
Chris Lindstrom named to Pro Football Journal's All-Pro team
Center Alex Mack announces retirement after 13 NFL seasons - ESPN
Alex Mack, former Falcons center, retiring after 13 NFL seasons
Does Alex Mack's retirement set the 49ers back?
Former Falcons center Alex Mack announces retirement
Pro Bowl center Alex Mack to retire from NFL after 13 seasons: report
Brandon Brooks, Alex Mack Make NFL Retirements Official, by SwaveSports
Alex Mack, a three-time Pro-Bowl center with Browns, announces retirement
NFL roundup: Latest league news from Thursday, June 2
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49ers center Alex Mack to retire
Deshaun Watson allegedly offered $100,000 to settle each lawsuit, plus three big retirements in the NFL