Rick Cerone lined softly back to the mound. Larry Milbourne popped out to second base. Randolph grounded to second. And that was it. Perry had his 300th win, and the 5-year-old Mariners had their 303rd. Perry raised a fist and punched the air. His teammates, some of whom hadn't been born when Perry signed his first pro contract, with the Giants' organization in 1958, mobbed him and led him toward the clubhouse and the Mariners' first official champagne squirt. Pitcher Larry Andersen, at most times a cutup, respectfully asked Perry to autograph a baseball for him. And then Perry reflected on his next goal. "Three-oh-one," he said.