I heard that the cortosone he was using to deal with his hip (legal) can possible cause the reduction is the epistorene (sp?). Heard this on SC. Given the testing he was going to get it would be insane to dope during the race. He was tested when he was wearing the yellow jersey earlier in the race?
I don't see how a steroid injection would help him in the middle of the race. My understanding is that you have to use steroids for a period of time to get an effect. EPO (which help with oxygen uptake) is the preferred way of cheating for endurance athletes.
Hope he was clean this doesn't really make sense.