I don't normally thank people publicly for detailed feedback, because doing so feels like a slight to the many contributors that I don't recognize. Nevertheless, I'd like to thank Damon Preston for sending me the following bug report and his league's saved game file — helping me find and fix some issues in the relief pitcher code.
Baseball Mogul tries to use pitchers according to their specified roles (e.g. "Short Relief").
In an 8th-inning save situation, the game should have chosen Tony Watson (the Setup Man). But my analysis of the saved game file showed that the code skipped Watson to get the platoon advantage, and it went all the way down to Jimenez because of a tiny difference in pitcher fatigue levels.
I was able to rewrite the relevant code and fix the above mistakes in Version 23.07. Thanks to everyone for the continued feedback. Baseball is a complex game, and it takes a village to create a realistic simulation of it.