Panthers QB Sam Darnold (shoulder) will be placed on IR and is expected to miss 4-6 weeks, HC Matt Rhule said Wednesday. Darnold's injury is not believed to be season-ending, Rhule added, but he can be dropped in all 1-QB fantasy leagues. QB P.J. Walker is slated to start while Darnold is out, with QB Matt Barkley backing him up.