Carlos Santana or Miguel Olivo?

Santana, easily. He should not be on your waiver wire, especially with his improved power numbers over the past week or so. If you have an open DL spot, it wouldn't be a bad idea to pick up Napoli either, just move him to the DL then grab Santana. As stated, Olivo is a very streaky hitter. In addition, he does play for the Mariners and calls a big pitcher's park as his homefield (Safeco Field). I'd expect Santana to be the superior option the rest of the way - better team, better homepark, much more potential.