Actually, mediocre DH types don't fetch much at the deadline.....good rebuilding teams take flyers on guys with huge upsides, mostly RPs or SPs, or former top prospects that are still under 30. Older DH types just don't fetch much at the deadline. What, exactly, is Park or Vargas learning in AAA, that would be better than learning in the majors? Park is 29/30, he's either valuable now, or he's never valuable. Play him. He's the guy you might be able to flip at the deadline, you already have that player in Park....