[asrivkin]

I am delighted to share with you the Union Grounds, home to the St. Louis Maroons of the Union Association (1884) and the National League (1885-1886). The Maroons dominated the Union Association during its only year of existence, but did rather poorly as an NL team and moved to Indianapolis in 1887. The grandstand was demolished in 1888.

Google Drive Link to St. Louis Union Grounds 1885

There's a SABR article about this park, and also a little info in Green Cathedrals about it. It's the latter that informed the very short backstop distance and the right field line distance, though I made the right field line distance longer than the claimed distance since it seemed to fit the street map better. I include a screenshot of the street map, though it doesn't show the field at all--it was made the year before the park, and I couldn't find anything from the years the field existed.

The SABR article gave the details about the scoreboard, the white color and the grandstand characteristics, though no dimensions. So, I'd call this historically informed, but we're shooting in the dark as far as details. The background, for those who care about this sort of thing, came from a likely-looking part of Rock Island, IL. I'll also note the odd choice to put a running track in the outfield. This is entirely based on the SABR article, which talks about the outfield being "encompassed" by a track. So, unless they used the word "encompassed" incorrectly, this would be more or less what the track would look like--I used a standard 200-m/indoor running track size, though with only ~2 lanes. If nothing else, it does give the field a bit of individuality...

For those keeping score at home, the latest parks complete the NL back to 1883, and we're one park away from pushing that back to 1880. I really think I'll do Exposition Park in KC next, then it may be a tossup between Forepaugh Park, and the Troy Base Ball Grounds (1882).