People have been using that "4 ER over his last 11 starts" stat a lot. Here's a partial list of good pitchers who have given up 4 or more ER in a single start in that exact timeframe: (spoilered for size) If you're thinking that list looks familiar, it probably does. It's the Fangraphs leaderboard for fWAR for qualified pitchers. The entire top 50 actually, with the exception of Jake Arrieta himself and A.J. Burnett, who was injured and not pitching for most of Arrieta's dominant run. Pretty nuts to think about.