The St. Louis Cardinals added a much-needed piece to the bullpen on Friday. So far this season, the one glaring hole for the Cardinals has been the bullpen. Now, of course, that doesn't mean everything has been perfect throughout the rest of the roster over the course of the entire season to this point, but the offense has done its job and the rotation has done enough to give the Cardinals a chance to win most games. The bullpen has been a weakness, though . On Friday, the Cardinals opted to demote starter Hunter Dobbins to Triple-A Memphis after he made his team debut on Thursday. Initially, it wasn't shared who would be coming up to replace him on the big league roster. The assumption was that it would be a reliever in some capacity with the club in the middle of a stretch of 17 straight days with a game. On Friday afternoon, the Cardinals announced that left-handed hurler Jared Shuster was promoted to the big league roster to replace Dobbins.…