My stomach kind of turned when you said mma school. We have kids that do mma training but they are very advanced at wrestling, judo, jujitsu, and kickboxing. If he's just starting out or looking to complement his wrestling he would be better off in a judo/jujitsu school IMHO.
Jens Pulver, greatest lightweight striker of all time, no seriously.
"I fear no man, but Jim Harrison and Mike Stone are the two last men that I would wish to meet in an alley fight. Jim Harrison's fighting style is not flamboyant or spectacular, it's just simple and deadly!" - Bruce Lee