Baseball's record book is revered like the bible. NFL, NBA, NHL have all gone through changes in the game that have turned their record books upside down. The MLB record book was fairly consistent from the 1920's to the steroid era. Only major change in the game was the lowering of the mound when pitching became too dominant in the late 60's. 60HRs was touched 2x in 70years, then surpassed 6x in three years, all by guys that juiced.

I can write off pitchers doctoring the baseball and corked bats as gamesmanship, because they aren't used everyday, in all situations. The effects of Juice and HGH are an everyday thing that hurts the integrity of the game.