An interesting statistcal look at Jake Peavy this year vs. his 2004 year by Rich Lederer at http://www.baseballanalysts.com/
Don't Be Jaked By Peavy's Mainstream Stats
By Rich Lederer
Peavy is actually walking fewer batters and striking out more per nine innings in 2006 than 2004, yet his ERA is more than TWO runs higher this year. That's almost impossible. How can that be? The obvious answer is that Jake is serving up more gopher balls this season (1.18 per 9 IP) than two years ago (0.70/9).
Furthermore, Jake's batting average on balls in play (BABIP) is a tad higher (.324) than it was two years ago (.310) despite the increase in flyballs and a decrease in groundballs.
Perhaps due to the reduction in grounders, Peavy is inducing fewer GIDP (0.34 per 9 IP vs. 0.92/9 in 2004). Jake is also allowing more stolen bases (1.26 SB/9 IP) than before (0.87).
Peavy was lights out with runners on base two years ago (.218/.311/.324) compared to the current campaign (.250/.315/.424).
With respect to the difference in Peavy's won-loss records, look no further than run support. When Peavy was 15-6 in 2004, the Padres averaged 6.44 runs per nine innings while he was the pitcher of record. His run support ranked 12th out of 86 qualified pitchers. This year, his teammates are scoring 4.21 runs per 9 IP, ranking him 80th among 93 qualified pitchers.