Mike 🇺🇸
Michael Ostrowski
100 profile views · Last seen 2 week(s) ago
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About
- Training since first belt18 year(s) and 5 month(s)
- LocationTempe, Arizona, United States of America
- AcademyJay Pages Jiu-Jitsu and MMA Verified
- AffiliationCaio Terra Association / BJJ Globetrotters
- Member sinceOctober 20251 year on Beltchecker.com
Lineage
- Mitsuyo Maeda
- Carlos Gracie
- Carslon Gracie
- Rodrigo Medeiros
- Arthur Ruff
- Gerson Atoigue
- Mike Ostrowski
Gi or no-gi
No-gi onlynow
5% Gi95% No-gi
Achievements
5 of 18 unlockedName verified by credit card
Profile manually reviewed & certificate issued
Current rank verified by promoting instructor
Verifications received19 / 25
102550
Years trained18 / 20
5101520
Gold medals0 / 5
51025
Competition matches0 / 10
1050100
Forum posts0 / 500
5001,000
Wall
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JNo worries! I mostly check colored belts for the required time in BJJ before BB, which checks out.
MThanks. I added lineage to the field. Unfortunately, I don't have any clear shots showing earlier belts. I have some group pictures, but most don't show my belt. On the brown belt, I added a comment refering to my presence on my former gym's website: https://rootsbjjaz.com/in[...]ructors-2/
JWould recommend adding lineage in the designated field. Plus evidence from earlier belts as well. See https://www.beltchecker.c[...]amp;page=2 for some advice on what to add.
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Promotion history
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- 11 months, 4 days
Black belt Current belt
December 6, 2025Tempe, AZ Jay Pages Jiu Jitsu
Promoted by
5 years, 11 monthsBrown belt
January 6, 2020Gilbert, AZ Roots BJJ
Promoted byGerson AtoigueI am no longer an instructor there, but as of Nov 3, 2025, the Roots website still shows me as a brown belt instructor at their gym: https://rootsbjjaz.com/in[...]ructors-2/
- Stripe 2October 14, 2022
- 5 years, 24 days
Purple belt
December 13, 2014Mesa, AZ Ruffhouse Jiu Jitsu
Promoted byArthur Ruff - 2 years, 2 months, 7 days
Blue belt
October 6, 2012Mesa, AZ Southwest MMA
Promoted by - 4 years, 4 months, 5 days
White belt
June 1, 2008Tempe. AZ Rage in the Cage
Votes received for current rank
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"His instructor, Mr. Pages, who is well known, claimed him."
"No doubt - Legit"
"Legit "
"Legit profile congrats on the black"
"Good evidence on dec 2025 BB from Jay Pages (also verified by me)."
"Well documented profile and promotion history. Congratulations!"
"All looks legit congratulations "
"confirmed by promoting instructor, who I also confirmed - Legit!"
"Well documented profile with a lot of pictures. Confirmed by promoting instructor. Legit!"
"Verified"
