I had a sports law class, where my professor said that the reason baseball has so much heat and scrutiny over PEDs is because of the baseball stat nerds. Because so much historical importance is placed on individual stats, PEDs in the MLB is viewed as worse than in the NFL, even though the guys in the NFL are likely just as dirty.

In baseball there are no assist HRs like there are assist tackles. It is 1 vs 1, not 11 v 11. RBs hit holes their OL created for them, most things in football are cooperative.

So thus there is not as much fervor over PEDs in the NFL, due to the nature of the game.