I'm not an insider but unless they discover some magic dust to sprinkle on his bat and he hits a pair of homers on Sunday, I expect the Moose will be grazing in St. Paul very very soon.
I think he's referring to Baseball Info Solutions Defensive Runs Saved Above Average. BBref has Wallner at -7, oops it just changed (lol, they must be updating data), his Rdrs is -5, tied for the worst in MLB at ANY position, with Brooks Lee.