The young guys on the team (Sano, Polanco, Kepler, Rosario) seem to be getting plenty of at-bats, so I assume the "benched" player is Vargas. It definitely sucks to lose him for a few weeks, but if Antony is shopping Plouffe to the contending teams right now, putting him in the lineup everyday makes sense. If he's not being shopped, then demoting Vargas obviously becomes much more difficult to defend.