You can't arbitrarily remove games and say they were better than so and so after that. If you are going to do that, you might as well remove the worst starts from all of the pitchers you are comparing, or better yet, go with their actual statistics with nothing removed.You can't arbitrarily remove them but I think it clearly illustrates one of the problems with ERA and just how much of an influence a manager can have on it. If it was obvious Wolf was struggling and was pulled his numbers would have looked a lot better. Getting left in just once a year to give up 5 more runs is a difference of 0.25 ERA over 180 innings.