The game between the Cardinals and Pirates in Pittsburgh was postponed, and they will play a double header on Wednesday. That may not be the only eastern game to be pushed to tomorrow given the weather map.
Update: The Blue Jays will not clinch on Tuesday as their game against the Orioles was rained out. They will also play a double header on Wednesday.
Update: Rain also forced the Twins and Indians to play a double header on Wednesday in Cleveland.