History is general is so carefully strung together that if you go back to one battle or event and try to recreate it, it would never be completely the same. The ebbs and flows of any event can change anything. Each pitch changes history in OOTP so Nolan Ryan might have the joy of facing a Don Drysdale because the computer does not recognize that Don left the game at 32 or Don was not as good and some of the players he faced became better because Don has a few off games that he did not have in real life so down the road when a Manny Mota face Ryan later on in his career. And so on...
You get the idea, you can not recreate what has been done exactly, the odds of that happening or even coming remotely close are beyond rationale thought and the space/time continuum.