I agree that some people are attempting to answer different questions. There are two general questions I see here: 1. How has Greinke's performance (not results) been in 2011? 2. How much should that performance cause us to adjust our expectations for him going forward? I disagree with the usefulness of using K rate. First of all, if you want to look at K rate, the denominator should be batters faced, not IP. Using IP inflates the K rate of a pitcher who is allowing a lot of base runners (since he faces more overall batters as a result). Not sure who even has K/BF though. K rate is SO important because: 1. A strikeout is an out 99.9% of the time. 2. Strikeout rates for a pitcher stabilizes quicker than other batting-result stats. What I mean by that is K rate is more representative of a pitcher's true skill with a smaller sample than some other stats (HR rate and BABIP for instance). If we are trying to estimate pitcher performance based on batting-results only and we only have 60 IP, I might only look at strikeouts and walks. That's not to say that the pitcher has no effect on anything else; it's just that with such a small sample, statistical noise, defense, etc... drowns out that "pitcher performance" part of it. Now, if we want to start looking at pitch-by-pitch data, that's entirely different. I have no confidence than anyone can just watch the games and tell me if a pitcher's command has been good over 60 IP, 250 batters faced and over 1,000 pitches. Any opinion they have will be heavily biased by the pitcher's aggregate results, IMO. But as Crew pointed out, just looking at spray charts isn't the whole picture either. Pitch f/x data is the way to go but I don't think we are there yet in terms of knowing how to exactly evaluate that data to determine pitcher performance.... well at least nothing publicly available at least.