St. Louis was a hotbed of baseball activity in the early 20th century. Two of baseball's great wars played out here-the rise of the American League and the rise and fall of the Federal League. No pennants flew over the city from 1900 to 1925, yet St. Louis teams were involved in a number of torrid pennant races. Here is the heyday of the St. Louis Browns and the emergence of the Cardinals, as well as a vibrant scene for semi-pro and black teams. The city had two of the greatest hitters in baseball history-George Sisler and Rogers Hornsby-and one of the game's most influential...