Billy O’Brien

Billy O’Brien is a Grey belt Brazilian jiu-jitsu competitor from Galeb BJJ, with a recorded Australian record of 5–6.

Grey

Fought 11 recorded matches as Grey since Apr 2025

Upset win

Ended a 5-match win streak

Beat Alessio Perrigo at Ipswich Open 2025 while they were on a 5-match run.

Wins

Win rate

45%

Losses

Recorded performance11 matches

56%

5–4 · 9 matches

No-Gi

0–2 · 2 matches

By belt

Grey5–6 · 1145%

Filter by Opponent	Filter by Event	Filter by Division

Cruz Paproth	17 May 2026Moreton Bay Championship 2026	Boys No-Gi / Grey / Junior I (10yrs) / -34.80 kg	Submission
Theo Taylor	17 May 2026Moreton Bay Championship 2026	Boys Gi / Grey / Pee Wee II (8yrs) / -33.20 kg	Submission
Aidyn Khan	17 May 2026Moreton Bay Championship 2026	Boys Gi / Grey / Pee Wee II (8yrs) / -33.20 kg	Points
Giuliano Souza-Robson	17 May 2026Moreton Bay Championship 2026	Boys Gi / Grey / Pee Wee II (8yrs) / -33.20 kg	Points
Eli Hayward	26 Apr 2026Ipswich Open 2026	Boys Gi / Grey / Pee Wee III (9yrs) / -36.2 kg	Submission
Benji Tocknell	26 Apr 2026Ipswich Open 2026	Boys No-Gi / Grey / Pee Wee II (8yrs) / -34.80 kg	Points
Luke Kennedy	22 Mar 2026Caloundra Open 2026	Boys Gi / Grey / Pee Wee II (8yrs) / -36.2 kg	Points
Benji Tocknell	23 Nov 2025Gold Coast Championship 2025	Boys Gi / Grey / Pee Wee I (7yrs) / -33.20 kg	Submission
Alessio Perrigo	6 Apr 2025Ipswich Open 2025	Boys Gi / Grey / Pee Wee I (7yrs) / -30.20 kg	Points
Odhran O’Neill	6 Apr 2025Ipswich Open 2025	Boys Gi / Grey / Pee Wee I (7yrs) / -30.20 kg	Points
Arlo Bakes	6 Apr 2025Ipswich Open 2025	Boys Gi / Grey / Pee Wee I (7yrs) / -30.20 kg	Points