That is a good question...I have never even thought about that. I think because back in the days when baseball started back in the late 1800's, america was really one of the only countries to have the sport, if not the only one. so at the time the winner truly was the best team in the world. But now with cuba,and Japanese leagues becoming huge, it would make sense to have the winners of each league play in playoffs to find out who really is the best team in the world. Not like the world baseball championships, where its country all stars vs. country all stars. They should make the game between best teams from the leagues.
You can help the HubPages community highlight top quality content by ranking this answer up or down.