ERA over a month or two isn't completely useless but it certainly has the capacity to be very misleading. If you want to analyze half a seasons' worth of a pitcher's starts, you are better off starting with a pitcher's secondary numbers than his ERA. Look at his K rate and walk rate before anything else. Those generally jump around much less, so a significant change in them (even over a short period) can indicate injury, mechanical issues, etc.. much better than ERA. And to call Cappy a one year wonder is to admit that you are using a pitcher's record are your primary tool to measure performance. Despite his below .500 record in 2006, he almost halved his walk rate while keeping the same K rate. This year, his walk rate is back up but at least his K rate is where it "should" be. Perhaps injuries have hurt Cappy's performance this year but the stats don't demand that explanation. No one should ever be surprised if a true 4.0-4.25 ERA pitcher (which Cappy appears to be) has an ERA in the high 4's at mid season. ERA is just too course of a measure of performance. And it's easy to poke fun at the uncertainty of small samples but an explanation for the principles that govern them could be found on dozens of websites on the web. Anyone who ever wants an answer to the apparently rhetorical question, "When is the sample large enough?" could find it themselves if they wanted to. I appreciate that most aren't interested in that kind of stuff but those statistical laws govern the stats we as baseball fans look at everyday, whether we want them too or not! http://forum.brewerfan.net/images/smilies/smile.gif