It's a hot photo of him lol, but as with everyone else I would classify it as non authentic. The few authentics I've seen from him, which I'll admit is only two or three, look different than that one.

I'm with whosurdaddy. I don't think that this is a genuine autograph. Is it also from eBay? If so, that it is very unlikely to be genuine, inless it's a charity auction.
James

I would say no. Notice the A. I have never seen an authentic example where he starts his A from the right, goes up to the left, down ,then crosses. All authentic examples I have seen he starts his A from the left, goes up to the right, down, and crosses it. Very distinct character trait.That's when he signs his last name which isn't often.

Is it an authentic? What do You think?