When Pilot Manager Joe Schultz, who had coached St. Louis' top base stealers Lou Brock and Curt Flood for the past five seasons, first assembled his expansion team at spring training, most of the players were unfamiliar to him. But one he knew well was Tommy Harper. The speed-conscious Schultz called the former Red and Indian over and said, "You were a fine stealer at Cincinnati, why don't you be like Brock? Anytime you get the jump, take the base." That was all Harper, who had stolen 100 bases in his four seasons as a Cincinnati regular but who had been held in check in Cleveland, where he swiped only 11 last year, needed to hear. Running without signs from the bench, the 28-year-old, right-handed batter added four steals last week to run his total to 17 in 21 attempts—best in the majors. That puts second baseman Harper, who is Seattle's biggest hero, ahead of the paces set by Ty Cobb and Maury Wills the years they stole 96 and 104 bases respectively. To keep his rooters cheering, Harper must get on base frequently and Schultz thinks stealing helps him do just that. "He studies the pitchers more now, and that makes him concentrate on hitting good pitches and getting walks," Schultz says. The new, studious Harper, a .251 career batter, hit .355 last week, raising his season's average to .310. He already has only 10 fewer walks than he drew all last year. The extra hits and bases on balls are important because Harper needs every chance he can get to run. "Stealing's getting tougher already," he says. "The pitchers throw to first more and the catchers pitch out more. From here on it's strictly a game of cat and mouse." At his present rate, Harper could finish the season with all the cheese.