49ers’ Solomon Thomas likely to stay sidelined until training camp

Thomas, the No. 3 overall pick from Stanford, was expected to participate during their mandatory minicamp Wednesday, which will include the final practice before training camp. [...] the NFL rule that prevents players who attend colleges on the quarter system from participating in most of the offseason program should keep Thomas off the field Wednesday. The Panthers' team web site noted rookie running back Christian McCaffrey, Thomas' teammate at Stanford, can't practice until Thursday when Carolina has its final practice of its mandatory minicamp.