"DRA concerns itself with all outcomes and all runs allowed. It doesn’t zoom in on strikeouts, walks, and home runs, to the exclusion of all else. What it does do is credit pitchers with their role in the outcome of every plate appearance. The effects of opponent quality (in essence: how good is the opposing hitter?), defense, the catcher, the umpire, the ballpark, all of these things are corrected for. Not perfectly, of course, that would be impossible, but as well as we can. DRA also measures a pitcher’s role in slowing the opposing running game, and credits or debits him accordingly." Well. That sounds like a pretty ambitious stat. I can't tell if I want to know more, or if I want to laugh at the sheer scope of what it wants to (thinks it can?) measure.