This article in the Chicago Tribune
http://www.chicagotribune.com/sports...-sportsnew-hed
mentions that he could have been shooting up for sometime but he could have botched protocol he was following to mask the illegal activity. That's the first time I saw that option and in a way it makes sense. That or that the sample was tampered with are really the only options. The article also mentions the 11-1 ratio which is WAY above the acceptable levels of 4-1.
Results of test B should be out soon...