I would be very surprised if the Twins had a bench that consisted of a backup OF'er, utility IF'er, a backup catcher and a platoon DH/1B. I could see a possibility of a Palka type (instead of a 1B man) that can at least play the OF in this scenario but the team would have very little positional bench flexibility with your proposal. I think Vargas will be the DH but he will have to at a minimum not lose the role to Park in spring training. Both players have options so I don't necessarily see Park being the favorite because they have to see what they have in him. This FO is under no pressure to validate that signing.