In baseball, as in much poetry, beauty comes from tension. Groundrules and boundaries confine those who would play, but the best find ways to exploit their strictures, and just as the daring base runner takes second on a fly to right, the practiced poet trips the sleepy reader with a surprise rhyme, bold line break, or a jarring reversal of foot. It's no surprise, then, that hardball has a larger body of literature than other sports, or that aficionados...