David Avellan is an accomplished American grappler and a jiu jitsu black belt under Ricardo Teixeira, well known for his many battles in important no-gi tournaments such as the ADCC and Grapplers Quest, where he defeated legends of our sport, including Amaury Bitetti, Alexandre Ribeiro, Rafael Lovato Jr. and Tarsis Humphreys - to name a few. David and his brother Marcos Avellan are also known as the founders of the Freestyle Fighting Academy, a gym where they teach their martial arts methods based on grappling and striking, having developed big names in combat sports such as Enrico Cocco, Jorge Masvidal, Michael Bernhard, etc. The Avellan brothers are also known for their "kimura-trap" system, a compendium of techniques that uses the kimura lock as its foundation.