I didn’t really have a good answer to your question about Per Game rates, so I asked THT’s David Gassko, who kindly (and quickly!) responded:

Per game means per 39 batters faced, I believe, which is about the average number of plate appearances in a game. The reason we do it like that is that innings pitched can be influenced by things out of the pitcher’s control, such as how good their defense is. Per game stats are a better indicator of the pitcher’s true ability than per nine innings.

Yeah, what he said.

And I admit to not knowing how your rate stat notation of x/G was calculated. While we’re on the topic, why do you believe that’s a more informative way of describing a pitcher’s performance than rates per 9ip? Normalizing to league tendencies like that would seem to introduce more complications than benefits, I’d naively think. I can see the advantage of avoiding division by zero errors, though.

Home Runs Allowed per games pitched. This stat is based on the number of home runs allowed divided by total number of batters faced, times the average number of batters per game in that specific league (generally around 38 batters a game).

So it’s kind of in-between GS and 9IP.

If you look at some of the pitchers Total bases allowed per 9, Hudson has 14.14 bases per 9, Penny has 14.95, and Wainwright has 17.66. I realize this is only one stat, but it’s just another way to look at it.

Since these were calculated, I thought I might as well do Morris’s for his 26 y.o. season (2001)…it is 15.99 bases per 9, still lower than Wainwrights.

Another similar stat for Wainwright and Morris that I thought was interesting was their avg ip per start. Wainwrights is 6.28, while Morris’s is 6.35. Food for thought.