Arabella "The Mesa Mauler" Costello

ADCC US Open - Nashville, TN 2026-09-19

🥈 2nd Boys [11-12 years] / Advanced / -28,0 kg

Lost vs Kai Byrd (V.R.M.A / Fight Sports)
Boys [11-12 years] / Advanced / -28,0 kg · Round 3 · submission
Won vs Kirk Landim (Alpha Miami Grappling)
Boys [11-12 years] / Advanced / -28,0 kg · Round 2 · points
Lost vs Sophia Clossey (Rose Academy Black Thorns Comp Team)
Girls [9-10 years] / Advanced / -28,0 kg · Round 2 · submission
Lost vs Elizabeth Valk (Alpha Miami Grappling)
Girls [9-10 years] / Advanced / -28,0 kg · Round 2 · decision
Won vs Amiyah Emery (Saiyan Jiu Jitsu)
Girls [9-10 years] / Advanced / -28,0 kg · Round 1 · submission

Youth Worlds 2026-08-09

🥈 2nd Girls [7-8 years] / -32.0 kg

Lost vs Eliana Parker (AOJ)
Girls [7-8 years] / -32.0 kg · Round 2 · points
Won vs Sophia Placencia (Wanderley Jiu Jitsu)
Girls [7-8 years] / -32.0 kg · Round 1 · points

Grappling Industries PHOENIX 2026-06-27

🥈 2nd No Gi Kids / 8 - 9 years / Intermediate (Grey) / -65 lbs

Lost vs Layla Patino (RedHawk Academy)
No Gi Kids / 8 - 9 years / Intermediate (Grey) / -65 lbs · Round 3 · submission
Won vs Ethan Ferrari (No Breaks Jiu-Jitsu)
No Gi Kids / 8 - 9 years / Intermediate (Grey) / -65 lbs · Round 2 · submission
Won vs Evan Summers (Flow MMA Academy)
No Gi Kids / 8 - 9 years / Intermediate (Grey) / -65 lbs · Round 1 · submission

CompNet Phoenix Spring Championship Gi & No-Gi 2026 2026-06-06

🥇 1st Girls No-Gi / Grey / Little Champions 2 / 7-8 years / from 53.1 lbs to 60.0 lbs (Feather)

Won vs Olivia Lumpkins (Gracie Barra Avondale)
Girls No-Gi / Grey / Little Champions 2 / 7-8 years / from 53.1 lbs to 60.0 lbs (Feather) · Round 3 · points
Won vs Emerson Mahnken (Gracie Barra Ocotillo)
Girls No-Gi / Grey / Little Champions 2 / 7-8 years / from 53.1 lbs to 60.0 lbs (Feather) · Round 2 · submission
Won vs Emerson Tiller (Gracie Barra Ocotillo)
Girls No-Gi / Grey / Little Champions 2 / 7-8 years / from 53.1 lbs to 60.0 lbs (Feather) · Round 1 · submission

Grappling X 5/9/2026 Jiu Jitsu World Championships, Azusa, CA 2026-05-09

🥇 1st Gi-- Youth Divisions / 7-8 Years old / Female / Grey / 60.1 - 70 Lbs · 🥉 3rd No-Gi --Youth Divisions / 7-8 Years old / Female / Grey Belts/Intermediate Division / 60.1 - 70 Lbs

Won vs Mailah Lizarraga (Valiant Academy)
No-Gi --Youth Divisions / 7-8 Years old / Female / Grey Belts/Intermediate Division / 60.1 - 70 Lbs · Round 3 · submission
Won vs Riley Johnson (Lake Arrowhead Jiu Jitsu)
No-Gi --Youth Divisions / 7-8 Years old / Female / Grey Belts/Intermediate Division / 60.1 - 70 Lbs · Round 2 · submission
Lost vs Kristina Hernandez (Checkmat Upland)
No-Gi --Youth Divisions / 7-8 Years old / Female / Grey Belts/Intermediate Division / 60.1 - 70 Lbs · Round 1 · points
Won vs Kristina Hernandez (Checkmat Upland)
Gi-- Youth Divisions / 7-8 Years old / Female / Grey / 60.1 - 70 Lbs · Round 3 · points
Won vs Mailah Lizarraga (Valiant Academy)
Gi-- Youth Divisions / 7-8 Years old / Female / Grey / 60.1 - 70 Lbs · Round 2 · submission
Won vs Riley Johnson (Lake Arrowhead Jiu Jitsu)
Gi-- Youth Divisions / 7-8 Years old / Female / Grey / 60.1 - 70 Lbs · Round 1 · submission

Grappling X 5/3/2026 Arizona State Jiu Jitsu Championships, Gilbert AZ 2026-05-03

🥈 2nd Gi-- Youth Divisions / 7-8 Years old / Grey / 60.1 - 70 Lbs · 🥇 1st No-Gi --Youth Divisions / 7-8 Years old / Grey Belts/Intermediate Division / 60.1 - 70 Lbs

Won vs Madison Winkler (Carlson Gracie Tucson)
No-Gi --Youth Divisions / 7-8 Years old / Grey Belts/Intermediate Division / 60.1 - 70 Lbs · Round 3 · submission
Won vs Kyler Baker (Bakers MMA and Fitness)
No-Gi --Youth Divisions / 7-8 Years old / Grey Belts/Intermediate Division / 60.1 - 70 Lbs · Round 1 · submission
Lost vs Javier Arizmendiz (12stjiujitsu)
Gi-- Youth Divisions / 7-8 Years old / Grey / 60.1 - 70 Lbs · Round 3 · points
Won vs Kyler Baker (Bakers MMA and Fitness)
Gi-- Youth Divisions / 7-8 Years old / Grey / 60.1 - 70 Lbs · Round 2 · submission
Won vs Nathaniel Gonzalez (Quan Phu)
Gi-- Youth Divisions / 7-8 Years old / Grey / 60.1 - 70 Lbs · Round 1 · submission

ADCC US Open - Phoenix, AZ 2026-03-28

🥈 2nd Girls [7-8 years] / Intermediate / -28,0 kg

Lost vs Haddie Parvi (Daimyo BJJ)
Girls [9-10 years] / Intermediate / -28,0 kg · Round 3 · submission
Won vs Frankie Dickerson (Gracie Barra Queen Creek)
Girls [9-10 years] / Intermediate / -28,0 kg · Round 2 · points
Lost vs Eden Armstrong (Marcio Andre Jiu-Jitsu Academy)
Girls [9-10 years] / Intermediate / -28,0 kg · Round 2 · points
Lost vs Ariel Freitas Barbosa (Marcio Andre Jiu-Jitsu Academy)
Girls [7-8 years] / Intermediate / -28,0 kg · Round 3 · points
Won vs Frankie Dickerson (Gracie Barra Queen Creek)
Girls [7-8 years] / Intermediate / -28,0 kg · Round 2 · submission

Grappling Industries PHOENIX 2026-03-14

Lost vs Kayleigh Harrington (Refuge BJJ)
No Gi Kids / 8 - 9 years / Intermediate (Grey) / -65 lbs · Round 4 · points
Lost vs Joaquin Guzman (Gracie Barra Maricopa)
No Gi Kids / 8 - 9 years / Intermediate (Grey) / -65 lbs · Round 3 · submission
Lost vs William Ward (Carlson Gracie Gilbert)
No Gi Kids / 8 - 9 years / Intermediate (Grey) / -65 lbs · Round 2 · points
Lost vs Benjamin Pena (Gracie Barra Chandler)
No Gi Kids / 8 - 9 years / Intermediate (Grey) / -65 lbs · Round 1 · points
Lost vs Joaquin Guzman (Gracie Barra Maricopa)
Gi Kids / 8 - 9 years / Grey / -65 lbs · Round 4 · submission
Won vs Cornelia Lichtenberger (One Love Grappling Arts)
Gi Kids / 8 - 9 years / Grey / -65 lbs · Round 3 · points
Lost vs Kayleigh Harrington (Refuge BJJ)
Gi Kids / 8 - 9 years / Grey / -65 lbs · Round 2 · submission
Lost vs William Ward (Carlson Gracie Gilbert)
Gi Kids / 8 - 9 years / Grey / -65 lbs · Round 1 · submission

ADCC US Open - San Diego, CA 2026-01-24

🥇 1st Girls [7-8 years] / Intermediate / -32,0 kg · 🥉 3rd Girls [9-10 years] / Intermediate / -28,0 kg

Won vs Milena Asgari (ATOS HQ)
Girls [7-8 years] / Intermediate / -32,0 kg · Round 3 · submission
Won vs Eden Armstrong (Gracie Barra Queen Creek)
Girls [9-10 years] / Intermediate / -28,0 kg · Round 1 · points
Lost vs Milah Shakhnazarov (Ascension Athletics)
Girls [9-10 years] / Intermediate / -28,0 kg · Round 1 · points
Won vs River Espinosa (Gracie humaita Valencia -Ca)
Girls [7-8 years] / Intermediate / -32,0 kg · Round 2 · points

ADCC US Open - Orlando, FL 2025-11-14

🥉 3rd Girls [7-8 years] / Advanced / -28,0 kg · 🥉 3rd Girls [7-8 years] / Advanced / -32,0 kg

Lost vs Kiera Thomas (Brabo Academy)
Girls [7-8 years] / Advanced / -32,0 kg · Round 3 · points
Lost vs Sophia Clossey (Rose Academy Black Thorns Comp Team)
Girls [7-8 years] / Advanced / -32,0 kg · Round 2 · submission
Won vs Sophia Clossey (Rose Academy Black Thorns Comp Team)
Girls [7-8 years] / Advanced / -28,0 kg · Round 1 · points
Lost vs Olivia “RAMBO” Manlangit (Clayton Phillips JJ)
Girls [7-8 years] / Advanced / -28,0 kg · Round 1 · points

ADCC Canada Vancouver Open 2025 2025-10-25

🥇 1st Girls [7-8 years] / Advanced / -28,0 kg · 🥈 2nd Girls [9-10 years] / Advanced / -28,0 kg · 🥈 2nd Boys [7-8 years] / Advanced / -28,0 kg

Lost vs Alexander Pilipenko (HEVA BJJ)
Boys [7-8 years] / Advanced / -28,0 kg · Round 2 · submission
Won vs Ilyass Gassab (Songer Combat Sports)
Boys [7-8 years] / Advanced / -28,0 kg · Round 1 · submission
Won vs Dora Guitard (Pacific Top Team Penticton)
Girls [7-8 years] / Advanced / -28,0 kg · Round 1 · submission
Lost vs Zoe Barnhardt (Mushin BJJ Academy)
Girls [9-10 years] / Advanced / -28,0 kg · Round 2 · submission
Won vs Mila Murdoch (A-F ACADEMY)
Girls [7-8 years] / Advanced / -28,0 kg · Round 2 · submission
Won vs Keelee Pileggi (Gracie barra Langley)
Girls [9-10 years] / Advanced / -28,0 kg · Round 1 · points

Grappling X 10/19/2025 Arizona State Jiu Jitsu Championships, Gilbert AZ 2025-10-19

🥇 1st Gi-- Youth Divisions / 6-8 Years old / Female / Grey / 45.1- 55 Lbs · 🥇 1st No-Gi --Youth Divisions / 7-8 Years old / Female / Grey Belts/Intermediate Division / 50.1- 60 Lbs

Lost vs Layla Patino (RedHawk Academy)
No-Gi --Youth Divisions / 7-8 Years old / Female / Grey Belts/Intermediate Division / 50.1- 60 Lbs · Round 2 · disqualification
Lost vs Layla Patino (RedHawk Academy)
No-Gi --Youth Divisions / 7-8 Years old / Female / Grey Belts/Intermediate Division / 50.1- 60 Lbs · Round 1 · submission
Won vs Layla Patino (RedHawk Academy)
Gi-- Youth Divisions / 6-8 Years old / Female / Grey / 45.1- 55 Lbs · Round 3 · points
Won vs Rose Wilshusen (Carlson Gracie Gilbert)
Gi-- Youth Divisions / 6-8 Years old / Female / Grey / 45.1- 55 Lbs · Round 2 · submission

ADCC US Open - New Jersey 2025-10-11

🥉 3rd Girls [7-8 years] / Advanced / -28,0 kg · 🥉 3rd Girls [7-8 years] / Intermediate / -28,0 kg

Lost vs Avery Kent (Black Tie Brazilian Jiu Jitsu)
Girls [7-8 years] / Advanced / -28,0 kg · Round 2 · submission
Lost vs Sophia Clossey (Rose Academy Black Thorns Comp Team)
Girls [7-8 years] / Advanced / -28,0 kg · Round 1 · submission
Won vs Alaina Stiller (Lobo MMA)
Girls [7-8 years] / Intermediate / -28,0 kg · Round 3 · submission
Lost vs Camila Acosta (Royal Jiu Jitsu)
Girls [7-8 years] / Intermediate / -28,0 kg · Round 2 · submission

ADCC US Nationals - Vegas, NV 2025-08-09