BOSTON -- Red Sox slugger Triston Casas provided details Friday on his left rib cage injury that will keep him sidelined for a minimum of a few weeks. The first baseman revealed he has torn cartilage. There was no break in the bones of his rib cage. “No ribs were fractured,” Casas said. “It's not a bone thing. It's more a cartilage thing. So there's the ribcage and then there's the sternum, and there’s pieces of cartilage that are in between those that connect the two. And that was what was torn, was the cartilage. “The way that the doctors...