Not necessarily agreeing with Murphy here, but he wasn't banking on a DP grounder on either of the next two hitters after Hoskins, and if Frelick was still at 1B w/two outs probably would've run then. Turang hit into the DP, which usually doesn't happen. Ruiz is about avg in throwing out runners, but that gets a bump due to Finnegan being, for a closer, very good at holding runners & preventing steals.
Like pulling Myers, it's one of those things where you can see what he's thinking, but the way things are going right now it'll probably blow up in his face no matter what he does.