Racing Positions49ers' Mack announces retirement after 13 years3YNick Wagoner49ers' 53-man roster projection includes extra defensive lineman3YNick Wagoner49ers sign Pro Bowl center Mack to 3-year deal4YNick WagonerWilliams stays with 49ers on historic $138M deal4YFalcons WR Jones, C Mack ruled out vs. Chiefs4YRodgers, Mahomes among Rooney nominees4YBarnwell: 13 NFL trade proposals before the deadline, including two QBs and a star TE4YBill BarnwellMack unfazed as Falcons draft likely successor5YVaughn McClureFalcons' O-line plan in disarray after losing first-rounder Lindstrom5YVaughn McClureFree-falling Falcons start to look to future in fifth straight loss6YVaughn McClure