I don't think this is true of all parks, but this is very true for AmFam. AmFam has a pretty small outfield which makes the HR ball that much more important here. Statcast oark factors 3 year rolling average has AmFam as a below average park for singles, doubles, and triples but one of the most favorable for HR. Baseball-Reference park factors has AmFam as a pitchers park. If you aren't hitting HR at AmFam it will be difficult to consistently put together a good offense.