Mercado. He looks like he'll become a competent 1B, whereas the others are just DHs. And I assume he'll improve as a hitter, since this is his second full season. Dedelman is right that Theriot is a decent hitter, but he has 45 durability, so I don't see him playing more than 80 games. If you just need a pinch hitter, take him. Olmedo has good power, but I'm afraid of that 41 eye. He'll be very inconsistent, and he'll struggle with low OBL, which isn't something you want from a DH.