Over 180 IP things tend to correct themselves to a degree, but it doesn't change the fact that ERA and WHIP are effected very heavily by the defense behind the pitcher. There's no be all, end all number for pitchers just like there isn't one with hitters. An ERA will tell you past results, but results don't always reflect performance. People are kind of arguing past each other in this thread. One part of the discussion is centered on ERA not being a good predictor of a pitcher's performance (especially when you are looking at something like 30 IP) - I agree with that. The other side is saying is that while that may be true, Capuano has still been terrible for a month - which I also would agree with. I think Cappy was just tired yesterday. If you look at the fact that it was 100+ degrees on the field, and he had to stand on the bases for so long, and couple that with it being his second start after a DL stint that included no rehab starts.