49ers Center Alex Mack Retires
49ers roster: How to replace C Alex Mack after retirement
Alex Mack - ABC7 San Francisco
49ers news: Alex Mack re-works his contract to free up $4 million in cap space as he mulls retirement - Niners Nation
Alex Mack Signs With San Francisco 49ers - Last Word on Pro Football
Former Cal Star Alex Mack Signs 3-Year Deal With 49ers - Sports Illustrated Cal Bears News, Analysis and More
Report: 49ers C Alex Mack to retire after 13-year NFL career - Niners Nation
Alex Mack Signs With San Francisco 49ers - Last Word on Pro Football
Menlo Advantage Spring 2015 by Menlo College - Issuu
49ers free agency: Alex Mack praises Shanahan, says playing for the 49ers is 'very enticing' - Niners Nation
NFL trade deadline offers: 13 proposals for players who could get dealt in 2020, including Sam Darnold, Dwayne Haskins, Zach Ertz - ABC7 New York
Alex Mack - ABC7 San Francisco