I don't see any real chance of Parmelee being an above average outfielder. He's not mobile enough and even though it's right field, defense is still required. Willingham is a bad defender and Parmelee doesn't look much better shape wise. Doumit was also really killing us in the outfield value wise. His build just isn't suitable for the outfield. Mastroianni is slightly below average overall with the bat, but you're disregarding the huge speed gap and difference in fielding which very likely eliminates Parmelee's advantage with a potentially higher OPS. Parmelee has potential as a 1B and a DH. The Twins are giving him the spot in RF, so they can see how he bats. And I agree that we have to find out if he can hit here. Mastroianni in right would make the Twins better in the short term, and if the Twins can fit Parmelee into the lineup via 1B/DH more often than right, it won't hurt them in the long term either.