Armstrong (3-2) earned the win Sunday over the Twins, retiring both batters he faced.
Armstrong has been moderately effective in a middle-relief role since joining the Cardinals, allowing four runs over 11.1 innings across 10 appearances. He's added an 11:2 K:BB in that span. For the year, Armstrong has a 4.97 ERA, 1.48 WHIP, 61:21 K:BB, one save and three holds over 58 innings between the Cardinals and the Rays. Given the success of St. Louis' high-leverage relievers, Armstrong is unlikely to move up the hierarchy.