Dave Boswell, a 21-year-old right-hander from Baltimore who pitches for the Minnesota Twins and answers to the clubhouse name of "Flakey," specializes in imitating bird, animal and insect calls (recently he had a bus driver frantically searching under the seats for a cricket). If asked, Boswell will give a dandy imitation of a Baltimore Oriole but, better yet—as far as Manager Sam Mele was concerned—Boswell pitched a one-hit shutout last week to beat league-leading Baltimore 7-0. And those Orioles were the same Birds who had averaged more than one hit an inning all year, led the major leagues in runs scored and had been shut out only three times previously. During the game Boswell struck out Frank Robinson three straight times, prompting Frank to tell a reporter: "How should I know what Boswell threw me? I didn't see the ball until the last time up." Boswell, who prefers to be called "Bullet," has been the best pitcher in the American League the last two months. On June 1 he had an 0-4 record: but now, after winning 10 of his last 11 decisions, including six in a row, he has a 10-5 record and also leads the league with 149 strikeouts. In a victory over the Yankees earlier in the week, Boswell, who had to leave the game in the eighth inning when he was hit by a pitch, once loaded the bases and another time had runners on first and third—both times with no outs—but managed to get out of trouble without giving up a run.