Steph Chambers/Getty Images The 49ers could be without quarterback Brock Purdy, left, for multiple weeks with an injury, leaving Mac Jones, right, to start. A day after 49ers head coach Kyle Shanahan called Brock Purdy a “long shot” to play in Week 2, NFL Network’s Ian Rapoport suggested the star quarterback’s absence could stretch well beyond that. Rapoport reported Thursday, citing sources, that Purdy is expected to miss anywhere from two to five weeks with a variant of turf toe. That puts