I brought this up in a general discussion thread (
https://forums.ootpdevelopments.com/...d.php?t=330809) but I believe it qualifies as a bug, or at least something that should be fixed. When changes are made to park factors, both on an existing stadium or moving a franchise to a new stadium, all past stats that are park-adjusted get modified based on the new factors. This shouldn't happen. Once a season is over, the park-adjusted stats should no longer get changed by any future changes to the park factors.