isn't that, like, the definition of inconsistent? Like, no it isn't. Telling me a player has been consistent doesn't tell you anything about his production because you could be consistently good or consistently bad. All that matters is that your performances don't fluctuate. A pitcher who allows six earned runs every single time he takes the mound is a consistent pitcher. A pitcher who allows 1 earned run every time out is also a consistent pitcher. I would classify an inconsistent pitcher as one who has two bad outings followed by a good outing followed by a bad outing followed by three good outings, etc. Because Z was bad for two months and then good for two months means he has been, for the most part, consistent. His good outings were mostly lumped together in June and July whereas his bad outings were lumped together in April and May To use some of the stats that Lord of Khemennu used: Z's average game score on the year: 53.9 Z's standard deviation of game scores: 19.3 But to look at it further: Z's average game score in first 12 starts from 4/2 - 6/1: 44.2 Z's standard deviation of game score over that time: 16.7 That shows that he was still a bit inconsistent but no more so than Marshall or Hill and I believe LoK said that "People should shut up about Hill's inconsistency" which would lead me to believe that a StDev of 16.7 isn't too bad. Now let's look at Z from 6/6 - 8/3 Z's average game score in next 12 starts from 6/6 - 8/3: 68.25 Z's standard deviation of game score over that time: 9.95 Yes, 9.95 which is far better than any starter on the Cubs. That is what I would call consistent. sorry, but being really good for a while and then really bad for a while is being inconsistent. i don't know what else you'd call it.