I saw them in NJ, 2014. I chose one of the initial dates to see them in good shape and not tired (in 2009 I saw them in Dallas, the 27th show of the Unleashed tour and Stevie looked a bit tired).
I don't think any of them have been under the influence of any substance or alcohol. That is just my perception.
Also John looked noticeably skinny, I think he had just recovered from cancer, so he sure was taking great care of himself.
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