Here's an example of what I think is the limited usefulness of relief pitcher's stats. These are Gregg's stats for the last two years:
2007: ERA, 3.54, saves 32 out of 36 opportunities (meaning 4 blown saves)
2008: ERA, 3.26; saves 29 of 37 (8 blown saves).
He probably won't be back next year. It'll be interesting to see how they handle his replacement. You'd think Lindstrom's fastball would make him the heir apparent. . .