Two days after making his first appearance of the season, Oakland Athletics closer Sean Doolittle was placed on the 15-day disabled list with a strained left shoulder. ''It's another muscle, almost under the armpit, that he strained,'' A's manager Bob Melvin said before Saturday's game with the New York Yankees. ''It will be a couple of weeks of inactivity before he picks up a baseball.'' The A's recalled right-hander Angel Castro from Triple-A Nashville. More...