Pleading ignorance here, but my guess would be a difference in anabolic steroids and some additive in a medicine or substance?
The rules don't work that way. In the NFL any first positive test will get you 4 games, 6 for the 2nd. In baseball, it's a 50 game penalty for first-time steroid offenders, 100 games for the 2nd. I recall a few years ago that Red Sox Manny Ramirez took a female fertility drug which is often used after a steroid cycle to balance the system. I guess he couldn't prove he was going for the big sex change.
