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Yamasaki has been involved in BJJ longer than most have been born
Stripes are not given because you are a better grappler, they are given on the basis of your service to the sport (teaching/passing it on to others)...
So Werdum being a 2nd degree simply means that since getting the Black Belt he has been teaching the art for longer than say a Roger Gracie...
Hence why Rickson is a 7th degree BB because he has been teaching BJJ since he was a teenager.
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