Interleague Games All Season Long

I haven't looked too far ahead on the schedule but it would appear that there are interleague games all season long. That is a logistical necessity with the move of the Houston Astros to the American League which leaves fifteen teams in each league. With an odd number in each league that means the two left overs would have to play. That will either open the door for more interleague games or raise a call for expansion to get both leagues evened up. Makes you wonder what the MLB master plan is.