This is the trickiest bit. My local BJJ club had a beginners judo for BJJ class taught by a double commonwealth gold Judo champion. If he chose to skill up in MMA, but chose not to enter any competitions. could he still teach MMA? Having been taught by the guy. I am sure that he had a huge amount to teach anyone. What about someone who had competed with MMA rules but only within a club with low standards of teaching, and poor quality 0pponens. could they still teach MMA?