Coach K · Stockton
Meet Coach K before your kid's first class, or your own.
Kalani "Coach K" Foster grew up in Stockton, holds a black belt under an Ares BJJ co-founder, and built this gym with his family.
5.0 on Google from 7 reviews · Ares BJJ affiliate
Built to give back to Stockton
A Stockton kid should come off the mat kinder, not meaner.
"Growing up in Stockton, I understand the struggles of the environment. That's why our priority is to empower and give back to the community through hard work and martial arts."
Learning to fight shouldn't come with a room full of egos.
How it started
The day a 115 pound kid broke Coach K's arm
Kalani grew up in Stockton. He started martial arts at 8, with eskrima, boxing and kajukenbo. As a teenager he joined an MMA gym to stay off the streets.
Kalani's first roll went badly. A 115 pound kid broke his arm. Nobody had taught Kalani to tap.
He came back the next day. That was more than 20 years ago.
How this gym runs
What Coach K won't bend on
- You learn to tap before you roll. That's the lesson of his first roll.
- A kid should come out of class kinder, not meaner.
- Your first class should cost you nothing.
- A gym should give back to the town it sits in. Sunday Service is free and open to all.
- Family, not franchise.
Lineage and record
The record
- Black belt Black belt under Osvaldo "Queixinho" Moizinho, co-founder of Ares BJJ
- 2017 Ares BJJ affiliate since at least 2017
- 20+ More than 20 years in jiu jitsu
- Age 8 Martial arts since age 8: eskrima, boxing, kajukenbo
- 61% His youth team finishes matches. In 61 percent of their wins, the other kid taps out. The California average is 52 percent. Across 51 tournaments, 2023 to 2026 (jits.gg).
- 2024 Featured on The Old Grappler podcast, 2024
- 5.0 5.0 on Google from 7 reviews
Owner and head coach
Kalani "Coach K" Foster
Owner and head coach. He coaches the kids classes himself.
Members call the gym Buffalo Black Brotherhood. It's a family gym in the plain sense. Kalani's family built it, and his own sons came up on these mats.
Said by people who train here
The room, in their words
Very good atmosphere, awesome people, and good Jiu-Jitsu. If you are in the area check it out.
Breno B., Facebook
Top notch jiu-jitsu with a tight-knit family vibe. Showed up once and was hooked immediately.
Hector P., Google
Meet him on the mat
Three steps from here
Pick a class on the schedule.
Ask for your free class.
Meet Coach K and learn to tap.
First class free · No card
Come see the gym for yourself
Not ready to book? Answer three questions and find the class that fits your week.
Kids: Kids Jiu-Jitsu. Adults: Adult Jiu-Jitsu. The art he started with: Eskrima. Directions and phone: Contact.