Could be that Oscar fully meant it as a little jab at Mosley. Although they are in business together, I never got the sense they would have any kind of personal relationship... And DLH is a proud man, I'm sure he does have some anamosity to this day about not getting the decision in the second fight with Shane(who was almost certainly using PEDS leading up to it). It's not as if he's going to jeapordize Mosley's standing with Golden Boy by making this claim, especially since Shane never actually tested positive for anything.