Those are the numbers I am using.
I'm exiting out to the screen that gives you the choice to see box score and quit. I then run the program once. Check box score, etc. Then I exit out of that screen, back to the main menu and then when I advance to next day, or to play next game, no one's stamina ever goes back up. I've done this for four or five games, and now my starters have stamina of 23, 25, etc. Bullpen is even less, even for those I never used.