Cleveland Browns center Alex Mack carted off field with serious lower leg injury; will not return against Steelers
Cleveland Browns: Alex Mack planning to opt out of contract - Sports Illustrated
What Happened To Alex Mack? (Complete Story)
Browns center Alex Mack deserves his payday and right not to negotiate contract during season - Dawgs By Nature
Johnny Manziel 'worked very hard to earn this opportunity' to start for Cleveland Browns, coach Mike Pettine says
Alex Mack's Difficult Decision to Finally Leave Cleveland, News, Scores, Highlights, Stats, and Rumors
Cleveland Browns center Alex Mack breaks leg, out rest of season - ESPN
Cleveland Browns center Alex Mack out for season - Sports Illustrated
Alex Mack Injury: Updates on Browns Center's Leg and Return, News, Scores, Highlights, Stats, and Rumors
49ers' center Alex Mack knows he can excel in Shanahan offense
What Happened To Alex Mack? (Complete Story)
Envisioning Cleveland Browns' Starting Lineup for 2015 Season, News, Scores, Highlights, Stats, and Rumors