By May 2019, the Washington Nationals—owners of baseball’s oldest roster—had one of the worst records in the majors and just a 1.5 percent chance of winning the World Series. Yet by blending an old-school brand of baseball with modern analytics, they managed to sneak into the playoffs and put together the most unlikely postseason run in baseball history. Not only did they beat the Houston Astros, the team with the best regular-season record, to claim the franchise’s first championship—they won all four games in Houston, making them the first club to ever win four road games in a World Series.