# Underworld BJJ

> Millersville, United States

## Overview

**Name:** Underworld BJJ

**Description:** Underworld BJJ is a Brazilian Jiu-Jitsu, boxing, and Muay Thai gym in Millersville, Maryland (Anne Arundel County), offering programs for adults, women, and kids. Head instructor Carlos Catania is an IBJJF-certified 4th degree black belt who trained under Royler Gracie; coaches Aaron Clevenger and Robert Whitmire also teach BJJ, boxing, and Muay Thai. The gym offers gi and no-gi classes plus open mat sessions, and welcomes visitors to try a free class during scheduled hours.

**Status:** Active

## Contact Information

**Address:**
301 Najoles Rd
Millersville, MD 21108, United States

**Phone:** +1 301-748-9846

**Email:** underworldbjj@gmail.com

**Website:** https://underworldbjj.com

**Social Media:**
- Instagram: https://instagram.com/underworldbjj
- Facebook: https://www.facebook.com/underworldbjj
- YouTube: https://www.youtube.com/@carloscataniabjjassociatio943

## Programs

### Gi Class

**Skill Level:** All

**Age Group:** adults

**Gi Requirement:** Gi required

**Classes:**
- Monday: 07:30 PM - 08:45 PM
- Wednesday: 07:30 PM - 08:45 PM

### No-Gi Class

**Skill Level:** All

**Age Group:** adults

**Gi Requirement:** No-Gi

**Classes:**
- Tuesday: 07:30 PM - 08:45 PM
- Thursday: 07:30 PM - 08:45 PM

### Open Mat

**Skill Level:** All

**Age Group:** adults

**Classes:**
- Saturday: 11:00 AM - 12:00 PM, 12:00 PM - 01:00 PM



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**Last Updated:** September 22, 2026

**Data Source:** bjj.space (https://bjj.space/gyms/united-states/maryland/millersville/underworld-bjj)