He had the jowls of Dizzy Gillespie, the chins of Alfred Hitchcock and the forearms of Olive Oyl’s favorite sailor man. For most of his 83 years, he had a haircut that required minimum maintenance and a quick, disarming smile that significantly widened his face and belied his sense of purpose. Well before his time came, he had developed a silhouette like no other in the game. If nothing else, Don Zimmer was distinctive, a ball of distinction, you might say — no corners, no angles, no edges. So round he almost was spherical.