We know that he used PEDs in the Khan fight because of the additional testing which was performed for the rematch. Peterson later admitted he used PEDs for the first fight after the drugs were discovered in the rematch testing. But the conventional
testing in the first fight didn't uncover the drug usage - it was only discovered when extensive random testing was performed for the rematch.
For the Holt fight there was only conventional
testing (extensive testing wasn't used) so do you think Peterson was back on the juice again for the Holt fight?
Here is the boxing scene story
which shows that Holt would have preferred extensive testing but still took the fight even though Peterson wasn't willing to do the required extensive testing : http://www.boxingscene.com/holt-not-...ed-past--62652