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Shamrock MMA

5 ★★★★★ 31 Google reviews · Kickboxing gym in San Jose, California

Kickboxing gym Free trial Beginners welcome Women's classes Private lessons Competition team

Plan your first class

  • Free trial or intro class most gyms welcome new members with a free trial or intro class — check their site or give them a call to book your first session
  • Beginner-friendly all fitness levels welcome, including total beginners — no experience needed, and you get in shape by training, not before
  • Women's classes dedicated women's kickboxing classes — a welcoming space to start out and train
  • Private lessons one-on-one coaching available — a focused way to start or to work around a busy schedule; ask about availability and rates
  • Sparring sparring and partner work for members who want it — always optional, eased in gradually, with the coach controlling the contact
  • Competition team a competition team for members who want to test themselves in the ring — amateur kickboxing, muay thai, or K-1
  • Today see hours ·
  • Website & schedule undergroundmma.us — book classes and see the live schedule
  • Phone +1 661-772-7662

Hours

Monday 10:30 am–9:30 pm
Tuesday 10:30 am–9:30 pm
Wednesday 10:30 am–9:30 pm
Thursday 10:30 am–9:30 pm
Friday 10:30 am–9:30 pm
Saturday 8 am–9 pm
Sunday Closed

Hours shift for holidays and class-schedule changes — worth a quick check before a special trip.

The classes they run

Kickboxing classes on the schedule at Shamrock MMA, confirmed in members' own reviews and the gym's own info — not guessed from the sign out front.

💪 Women's Kickboxing 2 mentions

“I LOVE THE ALL WOMENS CLASS <3 I got so fit, strong, and I learned to do things I never thought I could do.”

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🌱 Beginners 4 mentions

“I’ve been training here for 3 years, starting out as a complete beginner, and the experience has been nothing short of incredible.”

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🤜 Sparring 5 mentions

“And it’s super cool that you can do everything from no contact all the way up to (friendly) sparring, based on your interest level…”

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🏆 Competition Team

“If you want to learn how to fight/compete in MMA, come to Shamrock.”

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🦵 Muay Thai

“There is great emphasis on technique be it boxing/mma/kickboxing/muay thai which has helped me better my form and technique.”

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🥊 Boxing 4 mentions

“There is great emphasis on technique be it boxing/mma/kickboxing/muay thai which has helped me better my form and technique.”

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👤 Private Lessons

“They break things down in a detailed way and give you that one-on-one feel, even in a group setting, tailoring feedback to what you personally need to improve.”

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Other martial arts here

Kickboxing gyms are usually multi-discipline. Here's what else members mention training under the same roof at Shamrock MMA — mined from their reviews and the gym's own info.

🦵 Muay Thai

“There is great emphasis on technique be it boxing/mma/kickboxing/muay thai which has helped me better my form and technique.”

Other gyms that also teach muay thai →

🥊 Boxing 4 mentions

“There is great emphasis on technique be it boxing/mma/kickboxing/muay thai which has helped me better my form and technique.”

Other gyms that also teach boxing →

🏟️ MMA 25 mentions

“He could instruct on anything he chooses; he happens to operate in MMA and improving the health (and safety) of countless students.”

Other gyms that also teach mma →

🛡️ Self-Defense 2 mentions

Other gyms that also teach self-defense →

Disciplines are mined from reviews and the gym's own info — they show what members have trained, not a formal class guarantee. If you specifically want muay thai, boxing, or MMA alongside your kickboxing, confirm the current schedule with the gym.

What members say

The things reviewers bring up again and again across 31 Google reviews — in their own words.

🧑‍🏫 expert, motivating coaching 5 mentions

“Great coaches who truly care about your progress and a welcoming, supportive community.”

🌱 welcoming to beginners 9 mentions

“I’ve been training here for 3 years, starting out as a complete beginner, and the experience has been nothing short of incredible.”

💦 killer cardio workout 3 mentions

“People range from in great shape to in not great shape, older to young, the only commonality is a good vibe and desire to learn and have fun.”

🏆 active competition / fight team 2 mentions

“In that time, I went from a beginner to now having competed multiple times.”

🧼 clean, well-equipped gym 5 mentions

“Awesome coaches, friendly people, individual attention, cleanliness make it the best gym I have trained at.”

💗 welcoming to women 2 mentions

“I LOVE THE ALL WOMENS CLASS <3 I got so fit, strong, and I learned to do things I never thought I could do.”

From the reviews

I have been training martial arts for about 5 years now with 2 years being at another gym that is more well known throughout the country as a credible gym to improve your martial arts and self defense.

★★★★★ — Jacobi, Sep 2024

This gym is also referred to as Underground MMA. It is run by Jannsen Tariga, who was Frank Shamrock’s head instructor for over 10 years before Frank moved to LA and Jannsen started his own gym. The gym, instruction, and people are amazing.

★★★★★ — Brad, Oct 2024

Great group of guys with a team mentality. Class sizes are small, so you get plenty of individual attention. The coaches are highly knowledgeable, and each class builds on the last, so you learn practical chains and combos instead of just random techniques.

★★★★★ — Jeev, Dec 2025

Underground MMA/ Shamrock MMA is the BESSSSTT MMA GYM I HAVE EVER BEEN TO. I LOVE THE ALL WOMENS CLASS <3 I got so fit, strong, and I learned to do things I never thought I could do.

★★★★★ — Aisling, Sep 2024

Excerpts from public Google reviews. Read all 31 reviews →

New to kickboxing? Start at Shamrock MMA

Shamrock MMA comes up as a beginner-friendly gym — noted on their own site. If you've never thrown a punch or a kick, that's exactly who a good beginners class is for. A few things worth knowing before your first week. First, you don't need to be fit or coordinated to start — you get in shape by training, not before it, and coaches scale every drill to you. Second, you won't be thrown into hard sparring — reputable gyms build the basics (stance, footwork, and punches and kicks on pads and bags) first, and any contact eases in gradually under a coach's control. Third, all fitness levels really are welcome — ask about a dedicated beginners or fundamentals class time so your first session is alongside others who are also starting out. Most gyms are happy to let you watch or try a class first, so reach out before you commit.

See their beginner class info

Your first kickboxing class at Shamrock MMA

Nervous about walking into a kickboxing gym for the first time? Almost everyone is, and good coaches expect beginners to come through the door. Here's what to know. What to expect: a typical first class is a warm-up, then drilling the basics — stance, footwork, and punches and kicks on pads or a heavy bag — not hard sparring. Go at your own pace and rest whenever you need to; no one will bat an eye. What to wear: comfortable athletic clothes you can move and sweat in, and supportive trainers. What to bring: water, and hand wraps and gloves if you have them — many gyms lend loaner gloves for a first class, so it's worth asking when you call. As you keep training you'll add your own gloves and wraps (and shin guards once you start sparring). Sparring is optional and eases in gradually, once your basics are solid. Arrive 10–15 minutes early to sign a waiver and meet the coach. It gets easier fast — most people feel far more at home by their third class.

Kickboxing is a contact sport. Warm up, pace yourself, listen to your coaches, and if you have any injuries or health concerns, mention them before class and check with a doctor if you're unsure.

Where to find Shamrock MMA

5885 Winfield Blvd, San Jose, CA95123

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Listing verified July 2026 from public business records and member reviews. Something out of date? Report a correction. Own this gym? Claim your listing — it's free.