It’s pretty clear that in Rocco’s mind Buxton has been the one blocking Wallner…not Gallo. It’s been the opening up of the DH at-bats that finally got him here. (Today he rested Kepler).
That, and Rocco doesn’t want to give up the delta in defensive flexibility between Wallner (none), and Gallo (a lot).
But if Wallner is going to hit,,,and Gallo is not…it can’t be ignored when Buxton (and Polanco) return.
As usual, the obvious solve is putting Buxton in center. Then you can part company with Gallo, and take turns picking between Wallner and Julien who you’re going to hide at DH.