Red Sox rookie Clay Buchholz won't pitch for the rest of the year and will miss the postseason because of shoulder fatigue. The 23-year-old right-hander pitched a no-hitter against Baltimore on Sept. 1 in his second major league start, then was sent to the bullpen and made a relief appearance on Sept. 6. He had just one outing after that, starting and losing at Toronto on Sept. 19.