55 and a wargamer (board & miniatures) since the mid '70's. Had a spinner baseball game that had round cutout cards that you put over the spinners for the pitcher & hitter for the results, it was called All Star Baseball or something like that and had players from the late 50's and early 60's. A neighbors widow gave me this with a bunch of other games when her husband passed away, I was 12 at the time and ran an eight team league and kept stats for a 56 game season several times LOL. Thank you Mrs. Scott!
Played a lot of Pursue the Pennant board game over the years, Earl Weaver on my C64, Cactus League/Baseball Mogul/OOTP (since 14) on pc. (edit to add) Avalon Hill's Baseball Strategy was my first baseball game which I got for Xmas at 11 along with Football Strategy.
Thanks to kehowey for mentioning Ethan Allen's All-Star Baseball up above, I googled it and it is the game that I first mentioned :-D Wish I still had it, would be cool to give it another spin.