To use the system devised by baseball HQ for their qERA stat I'll look at his PQS pitching logs. The nice thing about the system is it doesn't dwell on ER's or H's and is more about the things a pitcher does control. A score of 5 is a dominant start, a 4 is very good, a 2 or 3 is ok, a 1 is bad, a 0 is terrible. second half of 2006 - 0,3,2,3,4,4,5,3,4,5,3,2,2,1,0 He was pretty good until the very end of the 2nd half and he tired out and had a bad run. First half of 2007 - 4,4,4,4,3,0,5,0,1,0,5,5,0,0,1 There is the inconsistency you are talking about. That first 0 is a game he left with an injury after 3 innings. The 0 after the two 5's is the game he got hurt in. Overall his first half had two 0's because of injuries, a 0 and a 1 after the injury. three dominant starts, 4 very good starts and 1 decent start. Second half of 2007 - 0,5,5,4,3,2,0,3,3,3 He really didn't pitch that poorly in the 2nd half, just gave up more HR's than you'd expect but overall he had a bunch of ok games. The system itself gives him a qERA of 5.07 last year which is right in line with what actually happened. He had a lot of 0's but most of them were centered around the injury so for my money I'm willing to bet it had something to do with it.