Will Harridge, the pleasant, gray-haired baseball fan who earns his living as president of the American League, struck a blow for fun and color the other day when he turned down Baltimore Manager Paul Richards' protest that the Chicago White Sox had stashed a binocular-bearing spy in the center field scoreboard to steal the Baltimore catcher's signals. Similar charges over the years have usually foundered on a lack of evidence. But this time Harridge, in effect, said skip the evidence, there has been no crime. There is no rule, he flatly informed Richards, against stealing signals, even if they are stolen by a man in a long black beard carrying a brass telescope. It was a blow to Richards but not to the fan who revels in these odd marginal disputes and who may, next time he sees a ball game, try to steal some signals himself. It's still a lot easier said than done, however, as the fan may agree after watching Philadelphia Manager Mayo Smith (opposite page) coaching at third. Is Mayo actually scratching his nose, adjusting his cap, clapping encouragement, resting his arms? Or is he sending terse, telegraphic messages into home plate to his alert batter to hit this pitch, take that one, bunt?