It wasn't ephedra that Roy Jones Juicer tried to hide behind, it was androstenedione. Ephedra is a stimulant, not an anabolic, and would not result in a positive test for anabolic steroids.
But thanks for playing "Let's Make Excuses For Roy Jones Who Juices"!
Roy Jones Jr. and Richard Hall both tested positive for the testosterone precursor androstenedione after Jones defeated Hall to retain his undisputed world light heavyweight championship in Indianapolis in 2000. Jones insisted his test was the result of ingesting the supplement Ripped Fuel.
- ESPN.com 3/1/07