http://espn.go.com/mlb/story/_/id/72...al-sources-say
This deal, however, figures to be especially historic, as baseball positions itself for the 21st century. Among other things, it will pave the way for realignment of the sport into two 15-team leagues, adding a second wild-card team in each league, spreading interleague play throughout all six months of the regular season and making significant changes to the draft, free agency and the so-called "Competitive Balance Tax."