Randy Brown Mantis Boxing & Brazilian Jiu-Jitsu

Jun 2026

My son joined the kids class for 9 months. He was always excited to come home and show me all the things he learned. I've never seen him so excited to be a part of any other sport he's tried. Randy Brown and Coach Tom have been great role models and I know he has taken away more than just knowledge of Ju-Jitsu. Highly recommend you check them out!

Jan 2023

I found the school to be welcoming, professional, friendly and student-focused. Classes are kept small and individual attention is paid even in a group setting. Randy maintains a focus on each student, providing insight, coaching and encouragement. Highly recommended.

Jul 2021

I think we can all agree that it's been a tough year+ with a pandemic taking a toll on everyone. Small businesses have been hit extremely hard; some having to change their business model overnight. RBMB was no different. However, instead of trying to fight against the change, Randy put in the work to adapt and evolve.I've been studying with Randy, on and off, for years. I was a student when he owned Plum Blossom, I've trained with him at RBMB in Acton, and I've also seen the changes made during the pandemic to help keep his students engaged and training. The new and improved website is incredible. It's extremely easy to use, and the courses listed are top notch. Not only...read full review