Asked to explain how it is that Frank Tanana, a stripling who turned 24 this week and a lefthander, should pitch with the wisdom of a 15-year veteran, Muffett paused for a moment, groping for the mot juste, and then plunged headlong into the mainstream of sesquipedalianism. "Frank," he said, "has excellent maturability." He paused again. "If there is such a word, that is." Well, there certainly is now, and we may expect to hear it again and again from pitching savants—"He's got good velocity and location. It's his maturability we're worried about."