This article references and more! St. Louis Cardinals infielder Matt Carpenter said he is "not concerned at all" about his sore back. Carpenter experienced discomfort in his back nine days ago in Cardinals camp and has yet to resume "baseball activities." The extent of his activity has been standing in the batter's box during batting practice without taking any swings. Carpenter added, "[...]Keep on reading: Matt Carpenter "Not Concerned At All" About His Back