By Sept. 1, the Cubs, Nationals and Rangers had realistically sealed up their respective divisions. The Indians' lead in the AL Central never dipped below 4 1/2 games that month, and the Dodgers maintained at least a 4-game lead over the Giants in the NL West for the final three weeks of the season. The only division lead that changed hands at any point in September was the AL East's, but even there the Red Sox moved ahead of the Blue Jays on Sept. 7 and never looked back.