Let's face it, this is a business. ESPN wants people to watch so they get $$$ for advertising.
What teams have the most fans? Well, Yankees, Cubs, Red Sox to name a few. So those teams will get a majority of the coverage.
And honestly, I don't give a s***. I'd rather have the sox be on in the last 5 minutes of SC and win than be on in the beginning and lose. As long as the Sox win they don't have to worry about the stupid SC anchors dissing them.