Quote:
Originally Posted by eriqjaffe
To test out my theory, I created a league starting in 1946. Every park then was open, with grass. Domes wouldn't come on the scene for 19 years, turf for 20, and retractable roofs wouldn't show up in baseball for 43 years (30, if you want to count Montreal's planned retractable roof). Yet I wound up with 2 teams playing on turf, and [b]6[/] teams playing in parks with retractable roofs (one of those park was one with turf). That's 37.5% of the league, which is completely unrealistic for 1946.
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If you want to go further, you can add minimum, maximum, and average seating capacity to the list of things affected by the year/era. (Average seating capacity has actually gotten smaller in recent years.) You could also add the presence of lights in a ballpark (allowing night games) as being tied to the year/era.