"Posnanski writes of major moments that created legends, and of forgotten moments almost lost to time. It's Willie Mays's catch, Babe Ruth's called shot, and Kirk Gibson's limping home run; the slickest steals; the biggest bombs; and the most triumphant no-hitters. But these are also moments raw with the humanity of the game, the unheralded heroes, the mesmerizing mistakes drenched in pine tar, and every story, from the immortal to the obscure, is...