He threw at least one strike in that at bat, he wouldn't have been throwing from the stretch if the previous batter had been properly rung up, even if that is a walk then 1 on 1 out is a very different situation, etc. I think that's excusing too much, though. They were trying to give us an out and he really just didn't perform, whether it was in the stretch or not, etc. The point isn't that Arrieta didn't do anything wrong with the second hitter, the point is that he deserved a better end result than 2 on, no out. Even if we say that the 2nd hitter is 150% on Arrieta, he should have had 1 on, 1 out, Sardinas maybe isn't bunting, the DP is maybe in order when Aoki is up, etc.