During the METS/TWINS game earlier today they were showing BA's based on the count on the batter. On the 1st pitch the league is hitting .352. On a 2-1 count the league is hitting .352, but on a 2-2 count, the league is hitting .176.
Before the All-star game non-sense, the leagues used to rotate. Because of inter-league play, I believe it's the team with the best regular season record.