I for one would love to know the inside story on what he's taken and where he's at with his bloodwork and other health stats. Would be interesting as hell to see how a guy who appears to approach the sport with a very conservative longetivity approach is really fairing, so a lot of guys could get an idea on the wear and tear of this type of approach.
I would think Dexter would be a moderate guy, but I don't think he would break much due to my own experiences as I've gotten older, you lose muscle you don't get back having long breaks when your getting older, to hold that body mass, i don't think he could go off, I would think he would need to almost cruise to maintain it, but no one would know he could abuse same as the others.