A friend of mine has been training MMA for about 5 years. Needless to say the guy is good. However in our school, because it's strickly an MMA curriculum, we don't use a belt system. (Well the kids do but not the adults.) Anyways, I was wondering the other day about what level my friend is in comparison to the BJJ belt system. I've seen him tap out purple belt level BJJ players who were about to advance to brown belt. And I'm talking about guys who place in their divisions at events like Naga and Grapplers Quest. I've seen him tap out a guy who competes in the Mundials purple belt level. So obviously this guy knows his stuff. (I've seen him tapped out by those guys also mind you but the point is that he hangs at that level.) My question is if this guy ever wanted to work his way up the BJJ ranks, would he have to start from the bottom as a white belt. Or do BJJ instructers do some type of assessment of experienced student's skills? How would that work? And yes he trains and competes with the Gi.