It has to be Backes. He plays the hardest minutes and performs the best defensively throughout the year.
Schwartz has been good, so I understand the votes. But, his games through out the year lacked that next tier defensively. Sure he is a turnover magnet, but his defensive positioning has been up and down.
Had Goc played more with the team he might get a scoche more attention for the award. His PK work has been phenomenal.