He doesnt fight but he does "sparr" all the time with MMA fighters, be it rampage, Randy etc. He does this for two things,
1) he actually enjoys the sport enough to sparr but not to fight
2) He also does it for homework. Lets face it, he has a job to do is prob paid well to do it. The ONLY way you can really know how to submit or in his job see how people 'might' be submitted is extremely advantagous to his job. You cant say "he is going for an arm-bar" if you really have never gone for one yourself.