Lots of things get better with age. Wine, for example. Actually, I think that’s the main example.
It’s tough to decide whether MMA fighters get better with age. Chances are, they’re not going to stick around long enough to be considered old unless they’re really good to begin with.
That said, you probably do learn a thing or two once you’ve spent a decade or more in the cage. In any case, here are the 15 great graybeards of MMA today, based on age, but also on number of fights and general grizzledness. Only active and reasonably legitimate fighters considered (sorry, Judo Gene).