Baseball will be making major changes in the next two years, adding two teams to the playoffs, and extending interleague play to September. The expanded playoffs could come as early as next year. That will put 10 teams in the postseason, requiring a new wild-card playoff round that probably will be one game, winner take all. The altered playoff structure is subject to an agreement on a new labor contract with the players' association, which is expected before the current deal expires December 11.