#5 Brazilian Jui Jitsu
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Brazilian Jui-Jitsu is considered to be the father of all martial art forms with reference to contemporary MMA. Created by legendary Judoko Mitsuyo Maeda and later popularized by the Gracie Family, Brazilian Jui-Jitsu was the foundation stone which the UFC was built upon.
UFC was founded by Rorion Gracie and the first three of the first five tournaments organized by the promotion were coincidentally won by the prodigal Royce Gracie. This helped in making Jui-Jitsu a phenomenon across the combat sports community, and till this very date, is an integral part of MMA. It was a gamechanger in more ways than one. Brazilian Jui-Jitsu underlined the significance of groundwork in fighting. It made everyone realize that fighters of smaller stature can beat larger opponents by using the labyrinthine grappling techniques of BJJ.
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BJJ focused on the fact that the size advantage can be taken out of the picture when the fight is taken on to the ground. BJJ revolved around the aspect of fighting to one's strength but more importantly, it revolutionized fighting on the ground in terms of positions and submissions.
The knowledge imparted regarding various positions on the ground such as side control, full mount, closed guard, half guard, and open guard served as the substratum of MMA while also opening up new avenues in the constantly evolving sport. The passing of guards and the subsequent setups for submissions that include a wide range of chokes, holds, and locks are practiced thoroughly till this very day.
Everyone knows that fighting against a seasoned BJJ practitioner is tricky as they can submit you from anywhere on the ground. Wrestlers seem one-dimensional in comparison to elite BJJ fighters and thus, traditional grapplers train in BJJ to expand their horizons.
As is with Muay Thai, Kick Boxing, and Wrestling, every UFC fighter is taught BJJ as it inexcusably a mandatory skill set needed in a resume.
Here are some of the best popular BJJ practitioners in UFC:
Fabricio Werdum
Royce Gracie
Demian Maia
Ronaldo Jacare Souza
Anderson Silva
BJ Penn
Nick Diaz
Kenny Florian
Brian Ortega
Rousimar Palhares
The number of UFC fighters with Black Belt are relatively less as it takes years to get the coveted grade. However, most other fighters barring the ones mentioned above have lower belts and continue to hone their BJJ skills with the aim of getting the black belt someday.
I'm sure you may have thought of many martial art forms that you feel were missed out on the list. Feel free to mention them in the comments section below.