there's no way that certain teams (yankees/red sox) would agree to that. and frankly it would be unfair to them. they didn't have a wildcard pre-1993. It's not unprecedented to have both teams not make the playoffs every year. I'm pretty sure that the D-Backs wanted to be an AL team since the time they were created, so they would seem like the natural team to move in an expansion scenario It's not that the Yankees and Red Sox have to make the playoffs, but that generally they are two of the best teams in the AL so having them in the same division wouldn't be fair to them if only one of them was going to make the playoffs every year. It doesn't just go for those two teams but for the divisions in general. The year the Mariners won 116 games, the A's won 100+ and had the second best record in the AL. Under the four divisions, four teams per division, one playoff spot per division format, that team would have missed the playoffs. well you can't expand the playoffs anymore unless you cut some regular season games I never said the playoffs had to be expanded. so you're arguing against a 4 division per league format then.