The average age stat is one to keep an eye on - you have an example of what can happen just over the water, in the Caribbean. In the '70's and '80's West Indies cricket was the unstoppable machine, sweeping all before it - across the islands, cricket was everything. Then satellite TV came along, showing NBA coverage. Pretty soon cricket no longer really mattered to West Indies youth - they all wanted to play in the NBA, so basketball took over. Now West Indies cricket is nowhere.So if MLB loses its young fanbase, they'll not be back.. 
So the question really is, what is the loss of MLB viewership and is there a comparable growth of another sport? I don't think soccer has really taken the spotlight that the MLB has had yet. Are the other major sports losing viewers? How much is also due to cord cutting?
