That's interesting. Unless I am reading this wrong,
Seems if I want my SP to go longer I would want to set him to something like F7, but if the roll chances fall heavier on the batters card by doing that then I would want them at F8 or F9. It makes sense that if the pitcher is fatigued at F7, then he doesn't have his stuff and the batters would get more or better chances. This may not be a large issue at 100mil or lower but at 140mil + it becomes a blow out with the better lineups.
So if I want that even split on which the roll lands on, the pitcher vs batter, then I need to keep them all at F9.
I have 1 team where the pitchers were all set to F8. Seems 1 was not getting his fair share of rolls on his card. I will move him to F9 and see what happens.