Man the people in the stands are like those facebook blue jays page commenters. Have no clue about baseball, cheer like crazy for a shallow popup that they think is a home run.
That's why I said at the end "Unless they were in a tight race". I'm talking about a team that has the WC locked down with enough time to insure their ace starts the WC game.
I would imagine teams would be re-arranging their rotation to make sure their aces were rested for WC games. Unless they were in a tight, down to the last day type race, then I could see your point.