There was a time when no town was too small to field a professional baseball team. In 1949, the high point for the minor leagues, there were 59 leagues and 464 cities with teams, two-thirds of them in so-called bush leagues classified as C and D. Most of the players were strangers outside the towns where they played, but some achieved hero status and enthralled local fans as much as the stars in the majors. Left on Base in the Bush Leagues:...