Commissioner Bud Selig announced that MLB will add two Wild Card teams -- one in each league -- for a total of ten playoff teams. Selig remains hopeful that the change will occur in 2012.
Selig also confirmed that the creation of two 15-team leagues means there will be interleague play "from Opening Day on," but he doesn't believe it will water down the World Series according to Andy Martino of The New York Daily News and Tom Haudricourt of The Journal Sentintel (Twitter links). Designated hitter rules will remain the same, and it would take a "catalytic event" for them to change reports Knobler (on Twitter).
The two Wild Card clubs are expected to meet in a one-game playoff prior to the League Division Series round, which increases the importance of winning the division.
Mike Axisa contributed to this post.