Brazilian Jiu-Jitsu • Tempe, AZ

STARTING IS THE SCARY PART. WE'LL TAKE CARE OF THE REST.

The Tempe gym where the quiet guy in the back gets pulled off the wall. No ego, no pressure, six days a week near ASU.

Coach Korey teaching adult jiu-jitsu class at Dark Matter in Tempe
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1525 E Apache Blvd, Tempe Near ASU, Tempe Marketplace, Mill Ave & the 101/202 interchange
5★Google Rating
6 DAYSPer Week
GI + NO-GIBoth Styles
⭐ 5.0 Stars — 63 Google Reviews

TRY A CLASS — FREE

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WHAT YOU GET WHEN YOU BOOK
  • Free first class ($30 value)
  • Loaner gi — no gear needed
  • Welcome guide sent the moment you book
  • Personal greeting from Coach Korey
  • 🥋 First 10 new members this month: free custom gi ($119 value)
See full details ↓
Adult jiu-jitsu instruction at Dark Matter near Tempe AZ Adult jiu-jitsu gi sparring at Dark Matter near Tempe AZ Dark Matter BJJ competition team serving Tempe Arizona Adult no-gi jiu-jitsu group at Dark Matter serving Tempe AZ

WHAT CHANGES WHEN YOU START JIU-JITSU

It's not just a workout. It's not just self-defense. Tempe members tell us jiu-jitsu changed how they move through every part of their life. Here's what to expect.

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SELF-DEFENSE YOU CAN ACTUALLY USE

BJJ is the most proven martial art for real-world self-defense. You learn to control and neutralize someone regardless of size difference — all through leverage and technique, not brute strength.

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MENTAL CLARITY AND STRESS RELIEF

When you are grappling, your brain has no bandwidth for work stress, bills, or your inbox. It is forced presence — the closest thing to meditation that also makes you physically capable. Tempe professionals call it their therapy.

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A COMMUNITY THAT HAS YOUR BACK

You will train with the same people multiple times a week, push each other through hard rounds, and build friendships that extend off the mats. Lawyers roll with students. Engineers drill with firefighters. The mat is the great equalizer.

WE TRAIN BOTH GI AND NO-GI

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Gi: Traditional kimono. Precise grips, technical detail, methodical pace.
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No-Gi: Rashguard and shorts. Faster, more athletic, direct self-defense application.

Most members train both. Beginners welcome in either.

MEET COACH KOREY

Coach Korey Kerber — Ares BJJ Black Belt and Head Instructor at Dark Matter Jiu-Jitsu in Tempe

KOREY KERBER

Ares BJJ Black Belt • Head Instructor

I almost quit jiu-jitsu in my first month — and it had nothing to do with getting tapped.

I'm shy. I'm introverted. Walking into a gym full of strangers and asking someone I'd never met to drill with me felt impossible. So I did what a lot of new people do: I stood against the wall, hoping someone would come to me, quietly deciding I probably wasn't cut out for this.

Then a brown belt named Omar pulled me off the wall.

He told me nobody was going to be annoyed if I asked them to train. He told me everyone in the room had been exactly where I was. And he told me the only real difference between a white belt and a black belt is that the white belt kept showing up.

"The only difference between a white belt and a black belt is the white belt kept showing up."

I kept showing up. Fourteen years later, I'm a black belt under Osvaldo "Queixinho" Moizinho, co-founder of Ares BJJ. I've competed at American Nationals, Pans, Worlds, Fight to Win, and the Phoenix Open.

But here's the thing nobody tells you about most BJJ gyms: they'd rather have one national champion than fifty lifelong beginners. The ego-heavy rooms. The coaches who only pay attention to the competition team. The culture where new people stand against the wall until they quietly stop coming back. That's why most people who try jiu-jitsu never make it past 90 days.

I opened Dark Matter because I wanted to build the gym I wished I'd walked into on day one. A place where the quiet guy who's never done this before gets pulled off the wall. A place where "everyone taps" isn't a warning — it's a welcome.

If you're nervous about starting, if you don't know anyone who trains, if you're worried you'll be the only one who feels out of place — you're exactly who this gym was built for. Come take a class. I promise you won't be standing against the wall.

14+
Years Training
10+
Years Coaching
11
Team Trophies

YOUR FIRST CLASS IS FREE

No contracts. No pressure. Walk in, train, and see if the mats are where you belong.

63 FIVE-STAR REVIEWS — HERE'S WHY

Don't take our word for it. These are real reviews from real members.

★★★★★

"Showed up without any prior martial arts or BJJ experience, and the entire gym was very welcoming to newcomers. Have been going 9 months now and can't picture going anywhere else. Korey is a very high level practitioner and a great instructor, makes learning jiu-jitsu a great experience."

— Connor Davis

Google Review

★★★★★

"Been training for about a year, with no prior experience. I love it here. The people, the instruction, the vibe is just so good. Coach Korey is not only a high level jiu-jitsu athlete himself, he's also an incredible instructor. I'm always asking questions, and he consistently gives clear and helpful tips."

— Tanner Hochberg

Google Review

Read All 63 Five-Star Reviews on Google →
Adult jiu-jitsu class at Dark Matter Jiu-Jitsu serving Tempe AZ

YOUR FIRST CLASS ISN'T JUST FREE.
HERE'S EVERYTHING YOU GET THIS MONTH.

Most Tempe gyms offer a free class. We wanted to offer something you'd actually remember — built specifically for the person who's nervous about starting.

YOUR FIRST CLASS — FREE
A full adult BJJ class. Beginner-friendly. Zero pressure to join.
$30 FREE
A LOANER GI FOR YOUR FIRST CLASS
Show up in shorts and a t-shirt. We've got everything else. No gear to buy, nothing to figure out.
FREE
"YOUR FIRST CLASS AT DARK MATTER" GUIDE
Sent the moment you book. Exactly what to wear, where to park, what the first 10 minutes look like. No surprises.
FREE
PERSONAL WELCOME FROM COACH KOREY
He greets you at the door before class, walks you through what's about to happen, and pairs you up with a training partner. You won't be standing against the wall.
PRICELESS
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BONUS: CUSTOM DARK MATTER GI WHEN YOU JOIN
If you decide to become a member, we'll order and size a custom branded gi for you. Delivered within 2 weeks. First 10 new members this month only.
$119 VALUE
Total Value This Month
$149+   YOURS FREE

Why this month? We cap the free custom gi at the first 10 new members each month so we can hand-size and order them properly. Bonuses reset on the 1st. If you've been putting this off, now is the month to actually do it.

CLAIM YOUR FREE CLASS

Fill this out and we'll text you within 15 minutes to book your first class.

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LET'S GO!

You'll get a text within 15 minutes to book your first class. Check your phone!

ADULT BJJ SCHEDULE

Morning, evening, and weekend training — six days a week.

ADULT JIU-JITSU

Monday9:00 AM — No-Gi Fundamentals6:00 PM — Gi Fundamentals7:00 PM — Live Rolling
Tuesday5:00 PM — No-Gi Fundamentals6:00 PM — No-Gi All Levels
Wednesday9:00 AM — No-Gi Fundamentals6:00 PM — Gi Fundamentals7:00 PM — Live Rolling
Thursday5:00 PM — No-Gi Fundamentals6:00 PM — No-Gi All Levels
Friday6:00 PM — Gi Fundamentals7:00 PM — Open Mat
Saturday11:00 AM — No-Gi All Levels12:00 PM — Open Mat

🥋 New to BJJ? Start with any Fundamentals class. No experience needed.

Claim Your Free Class →

QUESTIONS TEMPE RESIDENTS ASK

I have never done any martial arts. Can I still start?
Absolutely. The majority of our members started with zero experience. Every class is structured so beginners can learn alongside experienced students. You will drill at your own pace and nobody expects you to know anything on day one.
What if I don't know anyone at the gym? I'm kind of introverted.
This is the #1 concern new members tell us about — and it's the exact reason most people quit jiu-jitsu in their first month at other gyms. You won't have to figure it out alone here. Coach Korey greets every new student personally, walks you through what's going to happen, and pairs you up with a training partner so you never have to ask a stranger on day one. Everyone in that room stood exactly where you're standing.
How often should I train as a beginner?
Two to three times per week is ideal for beginners. That gives your body time to recover while building enough consistency to retain techniques. Most members settle into a rhythm within the first few weeks.
Will I get injured?
BJJ is one of the safest martial arts because there is no striking. The most common issues are minor — mat burns, sore muscles, the occasional jammed finger. We emphasize controlled technique and tapping early, which prevents serious injuries.
What is the difference between Gi and No-Gi?
Gi classes use the traditional kimono, which allows grip-based techniques and a more methodical pace. No-Gi is faster, more athletic, and translates more directly to real-world scenarios. We recommend trying both.
Do I need to be in shape first?
No. You will get in shape by training. We have had members start at every fitness level. The first few weeks will be challenging, but your conditioning improves dramatically once you show up consistently.
Is there sparring in every class?
Most classes include some form of live training. As a beginner, participation in live rounds is always optional until you feel ready. Nobody will force you to spar.
What makes Dark Matter different from other BJJ gyms in Tempe?
Coach Korey teaches every class personally, we maintain a culture where egos are checked at the door, and our 5.0-star rating with 63 Google reviews confirms the experience matches the promise.

YOUR QUESTIONS ARE ANSWERED.
YOUR FIRST CLASS IS FREE.

Let's get you off the wall and onto the mat.

By submitting, you agree to receive text messages. No contracts. Cancel anytime. Reply STOP to opt out. Privacy Policy

LET'S GO!

You'll get a text within 15 minutes to book your first class. Check your phone!

Claim Your Free Class