The Red Sox played a three-game series against an American League all star team following the end of the regular season and the beginning of the World Series. While the Red Sox had clinched in September, the St Louis Cardinals and Brooklyn Dodgers would play a three-game playoff for the National League pennant, pushing back the start of the World Series. The Red Sox hosted the three game exhibition series beginning October 1, 1946, at Fenway Park. The Red Sox won two of three, but Williams exacerbated his injury which would plague him in the Series against St. Louis.