David O'Mahony + Follow

ADCC Irish Cup Championship 2026 2026-05-16

• Lost vs Conor Devenney (New Ground Jiu Jitsu Academy)
  Male Adults (15+) / Professional / -65 kg · Round 1 · points

GrappleCity: South East Open 2026 2026-03-08

🥈 2nd Adult Gi / Adult / Brown / -67kg / Men · 🥇 1st Adult Nogi / Expert Brown/Black / Adult / -79kg / Men · 🥈 2nd Absolute Gi / Brown/Black / Adult / Open Weight / Men · 🥈 2nd Absolute No-Gi / Expert (Brown/Black) / Adult / Open Weight / Men

• Lost vs Solomon Simon (Ganbaru Jiu Jitsu)
  Absolute No-Gi / Expert (Brown/Black) / Adult / Open Weight / Men · Round 2 · decision
• Won vs Brian Collopy (Limerick BJJ Academy)
  Absolute No-Gi / Expert (Brown/Black) / Adult / Open Weight / Men · Round 1 · points
• Won vs Seán Carmody (Studio Galera)
  Adult Nogi / Expert Brown/Black / Adult / -79kg / Men · Round 3 · submission
• Won vs Solomon Simon (Ganbaru Jiu Jitsu)
  Adult Nogi / Expert Brown/Black / Adult / -79kg / Men · Round 2 · points
• Lost vs Seán Carmody (Studio Galera)
  Absolute Gi / Brown/Black / Adult / Open Weight / Men · Round 1 · points
• Lost vs Seán Carmody (Studio Galera)
  Adult Gi / Adult / Brown / -67kg / Men · Round 3 · points
• Won vs Emiliano Cislaghi (Ganbaru Jiu Jitsu)
  Adult Gi / Adult / Brown / -67kg / Men · Round 2 · points

ADCC Celtic Championship 2026 2026-02-21

🥈 2nd Male Adults (15+) / Professional / -65 kg

• Lost vs Caen Bourke (East Coast Jiu Jitsu Academy)
  Male Adults (15+) / Professional / -65 kg · Round 1 · submission
  ▶ Watch at 0:26:11

ADCC Irish Open Championship 2025 2025-09-27

• Lost vs Pierce Cunningham (Yodha Martial Arts)
  Men / Professional / -65 kg · Round 1 · points
  ▶ Watch at 0:28:59

Irish BJJ Open 2025 2025-05-24

🥇 1st Male Gi / Brown / Adult / -70 kg (Feather) · 🥇 1st Male NoGi / Brown / Adult / -67,5 kg (Feather)

• Won vs Tomasz Kulak (Atlantic Jiu Jitsu)
  Male NoGi / Brown / Adult / -67,5 kg (Feather) · Round 2 · points
• Won vs Sahand Afshar (East Coast Jiu Jitsu Academy)
  Male Gi / Brown / Adult / -70 kg (Feather) · Round 1 · walkover
• Won vs Luke O'Brien (Shannon Jiu - Jitsu Academy)
  Male NoGi / Brown / Adult / -67,5 kg (Feather) · Round 1 · no-show
• Won vs Luke O'Brien (Shannon Jiu - Jitsu Academy)
  Male Gi / Brown / Adult / -70 kg (Feather) · Round 2 · no-show

ADCC Irish Cup Championship 2025 2025-05-10

• Lost vs Tor Alexander Dunkjær (SIAM BJJ / Halavanca)
  Men / Professional / -70 kg · Round 2 · submission
• Won vs Mark Barry (AONTACH JJ)
  Men / Professional / -70 kg · Round 1 · submission
  ▶ Watch at 1:11:53

Grappling Industries DUBLIN 2025-03-01

🥈 2nd Gi Adult / Male / Brown / Adult / -155 lbs · 🥇 1st No Gi Adult / Male / Expert (Brown/Black) / Adult / -155 lbs

• Won vs Luke O'Brien (Shannon Jiu - Jitsu Academy)
  No Gi Adult / Male / Expert (Brown/Black) / Adult / -155 lbs · Round 2 · submission
• Won vs Dylan O Donovan (AONTACH JJ)
  No Gi Adult / Male / Expert (Brown/Black) / Adult / -155 lbs · Round 1 · submission
• Won vs Luke O'Brien (Shannon Jiu - Jitsu Academy)
  Gi Adult / Male / Brown / Adult / -155 lbs · Round 3 · submission
• Lost vs Dylan O Donovan (AONTACH JJ)
  Gi Adult / Male / Brown / Adult / -155 lbs · Round 1 · submission