Jason Rau's grappling journey began on the wrestling mats during his high school years, where he developed a strong foundation in positional control and takedowns. In early 2010, at the age of 20, Rau transitioned to Brazilian Jiu-Jitsu after accepting a friend's invitation to attend a class. Despite starting later than many professional grapplers, Rau quickly showcased exceptional aptitude, rapidly advancing through the ranks under the mentorship of former UFC welterweight champion Matt Serra. Serra awarded Rau his black belt on February 16, 2016, recognizing his remarkable technical growth and competitive achievements.

Jason Rau established himself as a prominent submission-only competitor, primarily active on the American East Coast grappling circuit. Known for his aggressive, submission-oriented approach, Rau secured notable victories over respected opponents such as PJ Barch, Josh Hayden, Victor Silvério, and Mansher Khera. His impressive performances at prestigious events, including Kasai Pro III (2018) and the BJJ Fanatics Grand Prix, further solidified his reputation as an elite submission grappler.

"Your Grappler's Favorite Grappler"

Widely respected among elite practitioners for his technical depth and innovation, Jason Rau earned the nickname "Your grappler's favorite grappler." Esteemed competitors such as Lachlan Giles, Craig Jones, and Nicky Ryan have publicly praised Rau's exceptional skillset and analytical approach to grappling. Craig Jones humorously dedicated a segment titled "Jason Rau that unassuming bastard" in one of his instructional videos, highlighting Rau's understated yet highly respected abilities. Similarly, Nicky Ryan described Rau as "by far the best… the most technical person I know," underscoring Rau's significant influence within the grappling community.

Advanced Leg Lock Systems

Jason Rau is particularly renowned for his sophisticated leg lock techniques, which have become a defining aspect of his competitive style. His systematic approach to heel hooks, ankle locks, and entanglements has influenced many practitioners seeking to elevate their leg lock proficiency.

Versatile Technical Arsenal

Beyond leg locks, Rau demonstrates a versatile and comprehensive grappling game, excelling in guard retention, inversions, and fluid guard passing. Training partners frequently highlight Rau's exceptional ability to seamlessly chain techniques and submissions, describing his transitions and sequences as "off the charts." His methodical yet dynamic style serves as a model for grapplers aiming to develop a complete and adaptable skillset.

In a significant step forward in his career, Jason Rau co-founded Vanguard Academy in Long Island, New York, alongside fellow black belt Nick Ronan. The academy quickly gained recognition for its world-class instruction and high-level training environment, attracting notable practitioners such as UFC champion Aljamain Sterling, who regularly attends Vanguard's open mats. As head instructor, Rau continues to solidify his reputation not only as a formidable competitor but also as a respected teacher and mentor within the Brazilian Jiu-Jitsu community.