This is very random, but this is something I've always wondered. Have teams from the same city in all 4 sports played on the same day? I know there have been plenty of days where 3 teams have, in the spring it happens often, for all 4 teams to play on the same day, it would have been be on a Monday, Thursday or most likely Sunday because of the NFL, it would have to involve a baseball team deep into the World Series and it would have to involve the NBA season starting as early as it can, something like October 29th. So that probably hasnt happened, but if we allow the NBA game to be a preseason game, it becomes much more likely.