Actually it happens ALL THE TIME in baseball:
http://www.popsci.com/entertainment-amp-gaming/article/2008-11/why-do-colorado-rockies-keep-their-baseballs-humidor
http://a.espncdn.com/mlb/columns/neyer_rob/1380568.html
http://deadspin.com/a-major-league-pitchers-guide-to-doctoring-a-baseball-1562307090
http://www.nydailynews.com/sports/baseball/doctoring-tricking-baseballs-tradition-old-game-article-1.1754822
So, there’s dried baseballs when the Rockies are at bat, and humid baseballs when the visiting team is at bat, right?
Your analogy doesn’t work.
As far as Gaylord Perry and other doctors of the baseball, a closer analogy would be individual NFL players doctoring their equipment or receivers wearing super sticky substance on their hands. I consider the gloves they wear to be highly suspect, BTW.
Again, the referees should have been held accountable for not detecting the supposed “big difference” in football inflation between the two teams.