Matt Maiocco’s 53-man roster projection after 49ers’ preseason win vs. Raiders

Time is running out.A good portion of the spots on the 49ers’ regular-season roster remain unsettled. Injury concerns are certain to shape many of the decisions, as San Francisco heads to the final stretch of the preseason.The team has just three more practices and a final preseason game this week.The 49ers close out the exhibition season with a Saturday night game against Jim Harbaugh and the Los Angeles Chargers at Levi’s Stadium.After that, coach Kyle Shanahan and general manager John Lynch must hammer out the team’s initial 53-man roster by Tuesday, Aug. 26 at 1 p.m.Here is a look at the team’s projected 53-man roster heading into this final week:Quarterback (2)Brock PurdyMac Jones*Non-football injury — Kurtis Rourke (knee)Overview: The 49ers should keep two QBs on their 53-man roster and have a third on the practice squad. They can bring back Carter Bradley, Tanner Mordecai or attempt to sign a QB who was released elsewhere at the final cuts. It makes more sense for the 49ers to keep an extra player at another position than to keep a third QB just to keep a third QB.Running back (6)Christian McCaffreyKyle...