Coming into the pre-season, I think Malone would have been my guess at a dark horse tweener stealing a spot, but I'd probably have him in the back of the pack currently (although not so far back it couldn't change at the drop of a hat).
I think Sill has some appeal given his PK ability and relative polish as a center. But it doesn't seem like there would be a spot open in the regular 12 starters for that skillset, so he could also be tapped as a first call-up should someone like Beagle, Eller, or Winnik get hurt.