I'm a little surprised to hear Maddon try to defend Peralta as if every pitcher has pine tar in his glove.
That would be news to me, but then I'm not an expert on the habits of professional baseball players. Obviously, we all know that you can't have stuff in or on your glove. Especially stuff to muck up the ball with. And sure, pitchers in the National League, so maybe they might have some residual pine tar in their glove. But obviously, the umpires are saying that Peralta's glove was obvious and had a significant amount.
Have you heard of pitchers having pine tar in their glove for any reason other than to doctor the ball???