Found the following issues with Google Earth in the ballpark settings/editing section:
1. Got this message when trying to have a stadium open in Google Earth:
"System could not open Google Earth. Probably it's not installed. Please download Google Earth from Google and install it." I installed Google Earth and tried it again, and got the same issue. Admittedly, I may just need to re-start my machine so that it won't show this error.
2. Got this message trying to open AT&T Park, and it did not load in Google Earth:
"AT&T Park.kml failed: Parse error at line 5, column 12."
3. Minute Maid Park's Google Earth pin is in a body of water. The "Location Lat." field for Minute Maid Park in the game had a "4" as the first number. When you take out the 4, Minute Maid Park loads properly in Google Earth.