I'd be shocked if Gurley isn't on the PUP List to start the season.
I don't know about that run blocking metric either, but I must admit there were quite a few times where it seemed that better patience/vision by the running backs might have produced a better rush.
One thing is for sure. The Rams have to do a better job of taking advantage of it's RBs talents by getting them the football more via the passing game. Cunningham is good. But, so are Mason & Gurley. And, if he makes the team, Trey Watts might just be better than all of them. Like Amp Lee or maybe even Faulk (minus the speed), I question if most LBs can adequately cover him as he can catch as shows great quicks to me.