Don Tanaka is the best player on the best team in the NL.
The argument against him winning the award is the "Yankee" argument. His team would win without him. Despite that, his numbers are the best across the board.
He already has won the Home Run Derby this year lets cap it off with the MVP.
Worth noting in the trivia department, Tanaka has won the MVP at HiA, AA and AAA already. Maybe if he wins it at the majors he can be demoted to LoA next season and RL the season after to complete the level MVP trophy case.