it hasn't been the smoothest of start for the San Francisco 49ers here in training camp dealing with the Brandon auk situation also they're starting left tackle Trent Williams is looking for a new contract and now in the injury news for the 49ers the star running back Christian mcaffrey as revealed by head coach Kyle Shanahan is dealing with a calf strain that he suffered this week and he already has been ruled out for the entirety of the preseason it's not like chrish mcaffrey was going to play at a lot during the preseason but I thought it would have been good for mcaffrey to at least get out there at least that's my feeling around every player that they at least should be out there for one drive or something like that for the preseason but with mcaffrey dealing with that c strain he's going to be out for the entire preseason and he will miss a couple weeks here in training camp also Elijah Mitchell is dealing with a hamstring injury and he will be out as well which is why they brought back a former running back in Matt breida