HOUSTON
Astrodome: 4% (1966), 4% (1979)
Small sample size but being Astroturf, it should have been a consistently good park for them.
KANSAS CITY
Municipal Stadium: 1% (1958), 2% (1966)
Probably about average or a little above. From 1965 forward was pretty deep to left (369-370 down the line, 409 to left center).
Royals Stadium: 6% (1979)
That rate is really high. Maybe '79 was an outlier and it wouldn't have happened without Willie Wilson on the team, but it was known for years that Royals Stadium was a great park for triples so it would stand to reason that it was great for inside-the-parkers as well.
LOUISVILLE
Louisville Baseball Park: 89% (1876), 100% (1877)
Eclipse Park I: 0% (1884), 0% (1890)
Eclipse Park II: 44% (1893), 4% (1895), 34% (1899)
I couldn't find dimensions for Eclipse Park II, but I's were pretty spacious despite the rate of zero for those two seasons.
LOS ANGELES
L.A. Memorial Coliseum: 0% (1958)
Did anyone ever hit an inside-the-parker here in the handful of seasons it was open? I would think the rate here would be well below average.
Dodger Stadium: 1% (1966), 1% (1979)
Small sample size but it was about one-third above the average rate in both years I did.
NEW YORK
Union Grounds: 11% (1876)
Polo Grounds I: 13% and 0% (1884)
Polo Grounds III: 20% (1890)
Polo Grounds IV: 16% (1890), 16% (1893), 5% (1895), 0% (1899), 5% (1900), 16% (1901), 19% (1902), 11% (1903), 44% (1905), 37% (1907), 38% (1908), 30% (1910)
Polo Grounds V: 40 and 16% (1913), 23 and 26% (1915), 26 and 29% (1917), 16 and 9% (1919), 11 and 25% (1920), 7 and 15% (1921), 6% (1923), 6% (1925), 2% (1931), 4% (1938), 2% (1948)
I expected to see a high rate here because of the huge center field, but I now conclude it was offset by the shortness down the lines. Sometimes its rate was higher than the overall rate, sometimes it was lower, and I think if you averaged it all out, this was an average park overall.
Hilltop Park: 6% (1903), 90% (1905), 94% (1907), 93% (1908), 100% (1910)
A very good park for ITPHRs after they pushed back the right field fence in 1904.
Yankee Stadium I: 26% (1923), 16% (1925), 7% (1931), 2% (1938), 1% (1948), 4% (1958), 3% (1966)
One of the AL's best parks for ITPHRs what with that spacious center field. In many years this park was double or more the average rate.
PHILADELPHIA
Jefferson Street Grounds: 38% (1884), 5% (1890)
Keystone Park: 20% (1884)
Philadelphia Baseball Grounds: 33% (1890), 22% (1893)
Philadelphia Baseball Grounds was
500 feet to left (!), 500 to center and 300 to right.
Baker Bowl: 2% (1895), 0% (1899), 0% (1900), 12% (1901), 57% (1902), 18% (1903), 23% (1905), 57% (1907), 67% (1908), 20% (1910), 3% (1913), 0% (1915, '17, '19 and '20), 2% (1921), 0% (1923), 2% (1925), 0% (1931 and '38)
As I expected, this was among the toughest of the old timey parks to get an inside-the-parker in. The rate was 0% in many years. I'm not sure why it was above average in 1907 and '08.
Columbia Park: 21% (1901), 20% (1902), 8% (1903), 14% (1905), 14% (1907), 27% (1908)
Below average park, half or less than half the average rate. It was 340 feet to left but only 280 to right.
Shibe Park/Connie Mack Stadium: 67% (1910), 3% (1913), 29% (1915), 7% (1917), 71% (1919), 1% (1920), 2% (1921), 2% (1923), 6% (1925), 3% (1931), 0% (1938), 1 and 4% (1948), 1% (1958), 4% (1966)
This park had a low rate through the deadball era until that one high year in 1919, after which the fences were pushed back and the center field wall raised. It had a low rate in the '20s and then an average-to-good rate from the '30s-'60s.