Silver Fox Brazilian Jiu-Jitsu Academy Phone: 201-398-6032
380 Market Street, Saddle Brook, NJ 07663  
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Why Train Silver Fox Brazilian Jiu-Jitsu?


Silver Fox BJJ Academy in Northern New Jersey is a Renzo Gracie Jiu-Jitsu, also known as Brazilian Jiu-Jitsu (BJJ) and Submission Grappling martial arts school. Silver Fox BJJ has been called one of the best schools in New Jersey and has been featured in many articles.

We Pride Ourselves On:

  • Highest quality Brazilian Jiu-Jitsu and Martial Arts instruction.
  • Focus on Technique, Leverage & Submissions rather than brute strength.
  • Friendly & cooperative atmosphere conducive to accelerated learning.
  • Personalized instruction where each student’s advancement is measured by their own progress.
  • Convenient schedule – We are OPEN 7 Days/week with Morning, Daytime & Evening Classes.
  • Nice, clean & functional facility with showers in both men’s and women’s locker rooms.

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What does Brazilian Jiu-Jitsu look like?

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Who is the "Silver Fox"?

The Head Instructor, Karel Pravec (aka Silver Fox) is a 3rd Degree Brazilian Jiu-Jitsu Black Belt under legendary Renzo Gracie and John Danaher. Karel is one of Renzo's original U.S. students, and has spent 30 years studying martial arts, including over 22 years of Brazilian Jiu-Jitsu with Renzo, John, and other leading teachers of BJJ. Karel still regularly trains with the highest authorities and practitioners of BJJ and mixed martial arts, including many current UFC fighters, at the world renowned Renzo Gracie Academy in New York. Karel is a highly sought after instructor who has taught seminars across the United States and in Europe, coached BJJ and submission grappling on national and international level (ADCC, IBJJF,  GQ and NAGA  tournaments) & cornered amateur and professional MMA fighters.

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"Calvin Coolidge once said “Nothing in the world can take the place of persistence. Persistence and determination alone are omnipotent.Karel Pravec, the “Fox” has demonstrated that persistence and determination to become one of my finest instructors. Karel was one of my first students in 1993 when I arrived in United States. With only a select few Karel has matriculated to black belt level, his technical know how and talent has shown in his students. Karel still competes at the highest level. I am proud he is continuing what my family and I have dedicated our lives to. As a friend and instructor I highly recommend his academy. Train hard and prosper.”


  • Grandson of BJJ Founder, Carlos Gracie
  • MMA Pioneer (13-6-1 record in Pride, UFC, World Combat Championship, IFL, RINGS etc.)
  • Holder of numerous BJJ and submission grappling titles (including 2x ADCC World Champion)
  • One of the greatest grapplers & martial arts teachers in the World



MATT_SERRA_BJJ_Bergen_County"Karel started his training at the beginning of the Jiu Jitsu revolution in America. When we (Karel and I) started with Renzo, Brazilian Jiu Jitsu was unknown and we worked out of a Judo school in Manhattan.Karel is an extremely tenacious competitor always attacking for the submission, true to my game and Renzo's teachings. At his academy, you will be downloaded with the highest level Jiu Jitsu and train with the best. I vouch for Karel, not only in his Jiu Jitsu skills but for his character. I am proud to have instructed Karel and be his -teammate."

Now it is up to you!


UFC World Champion (Welterweight)


Where in Bergen County is Silver Fox BJJ located?

The Silver Fox BJJ Academy is located in Saddle Brook, NJ, easily accessible from the Garden State Parkway, Routes 80, 46 and 17.It recently expanded into a new location with 3,000 square feet, with top of the line mats (Zebra MMA Pro) and remodeled locker rooms with showers.The academy serves students from Bergen, Essex, Hudson, Morris and Passaic counties. It is one of the few schools run by a Black Belt with direct lineage to one of the world's most elite Brazilian Jiu-Jitsu academies, the Renzo Gracie Academy in New York.

Professor Pravec has built a reputation for his technical knowledge and teaching style. Everyone who visits, from beginner to expert, agrees on the excellent instruction and laid back, friendly atmosphere of the school. We are a proud member of the Renzo Gracie Association and look forward to seeing you on the mats!






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