Hi Surfdoc, and welcome!
Following is the last item on the pitcher card explanation page, which can be found here:
https://365.strat-o-matic.com/help/pitchercard"Pitch-Count Fatigue -- The pitcher's condition is listed on the right of the play-by-play as a number from F9 through F0. F9 means that he is operating on all cylinders whereas F0 indicates that he has nothing left in the tank. Normally pitchers start their appearance as a 9 and maintain that level until they start to approach their pitch count. The lower the number goes the worse the pitcher will perform. When a pitcher's condition drops below F9 he starts to give up more singles, doubles, triples, home runs and walks. If a pitcher's condition drops to level F0 he will continue to fatigue the longer he stays in the game. His condition rating will remain displayed as F0, but he will start to give up more and more hits and walks if you leave him in the game."
Here are Wiki pages on pitcher fatigue, team settings (including pitchers) and the latest bullpen settings rules:
https://somonline.fandom.com/wiki/Pitch_Count_Fatiguehttps://somonline.fandom.com/wiki/Team_Settingshttps://somonline.fandom.com/wiki/Bullpen_v3Hope that helps!
And again, WELCOME to you and your gang of newbies...would love to see you guys do well, have fun and become regulars! Always good to see "new blood" to help keep this great game alive, and most of us oldtimers are happy to help if we can!