I don’t follow sports (and being in a different country I don’t have a clue) but according to all the ratings tables I’ve seen, the World Series wasn’t a competition in the 10pm slot.
That’s a good question. My TV box says it was going to 11 but I’ve also seen that it got moved up an hour, beginning at 7, since there was a rain threat. TVByTheNumbers says it was going from 8-11 so if it did move up an hour, then maybe it did end around 10ish (the issue is that it probably did not end at exactly 10 given the length of innings varies).
At any rate, the game likely played into it (people watching until the last minute and DVRing DS for the next day) even if it only last a few mins into 10pm. The real test will be the next episode, which should be free of World Series, at least.