I'm 32.
I didn't discover Strat until I was 22 but I have heapfuls of stat notebooks from playing a "Baseball Card Game" that was based on dice rolls using stats from the back of baseball cards. No pitching factored into the plays, although that didn't stop me from "warming up" pitchers if the current one was struggling.
Since then, being an accountant, I revised how the dice rolls SHOULD have been in order to properly replicate AVG/OBP/SLG, but again, this is still without pitching factored in. I also created a dice rolling function within Excel so I'm never without dice!