My guess (and ALL of our comments are guesses because only Pineda himself knows for sure) is that he did not know that what he was taking was banned. This reinforces a related point I've made previously in at least one other thread. The player and his team have a shared strong interest in having the player perform at his highest level as often as possible. The player should take no substances--none--without team knowledge and approval. (And, IMHO, that includes food.) And when it comes to any drugs or supplements, they should come only through team channels. And the higher-profile the player, the more that extreme caution needs to be used. A disaster waiting to happen would be for some unscrupulous individual to arrange to put some stanazolol into the food at the favorite restaurant of, say, Mike Trout. Maybe we're getting to the point where we have to have food-tasters, just like royalty in medieval times.