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Jonatan Colmans

Eastbound BJJ

W–L
1–1
Won and lost rating-eligible matches in the past 12 months.
Gi
-
Rating based on Gi matches in the past 12 months.
No-Gi
1,230
Rating based on No-Gi matches in the past 12 months.
Current form
1–1
Results from the ten most recent rating-eligible matches.
Opponents
2
Unique opponents faced in rating-eligible matches in the past 12 months.

Indexed career

Matches

7
Indexed competition matches
Date Opponent Result Event Division
2025-10-12 Merlijn Frieser
Loss
Versus Contender 5 No-Gi · Boys NOGI 14-17 years / Professional / -80 kg
2025-10-12 Mikail Samet Karabulut
Win
Versus Contender 5 No-Gi · Boys NOGI 14-17 years / Professional / -80 kg
2025-08-30 Jonathan Lots
Win
NAGA Amsterdam Grappling Championship No-Gi · Teens No-Gi (Male) / Beginner / 75 - 79.9 / 16-17 years
2025-08-30 Walid Akbar
Win
NAGA Amsterdam Grappling Championship No-Gi · Teens No-Gi (Male) / Beginner / 75 - 79.9 / 16-17 years
2025-08-30 Mohammed Wazeriah
Win
NAGA Amsterdam Grappling Championship No-Gi · Teens No-Gi (Male) / Beginner / 75 - 79.9 / 16-17 years
2025-02-08 Koen Lanting Milovac
Win
Grappling Industries AMSTERDAM No-Gi · No Gi Kids / Beginner (White) / 16 - 17 years (Male) / -185 lbs
2024-05-05 Philip Gezer
Win
Grappling Industries AMSTERDAM No-Gi · No Gi Kids / Beginner (White) / 16 - 17 years (Male) / -170 lbs

Calculation details

Rating breakdown for the past 12 months

See the published month-end rating and the rating-eligible matches added in each month. Open a month for details.

August 2026 No new matches · 3 left period Change -132 Rating 1,230

Rating-period composition

Rating matches
2 -3
Record
1–1 Previous month 4–1
Opponents
2 -3
Events
1 -1

3 older matches left the 12-month period: 3 won and 0 lost. The rating is then recalculated across the full network, so the monthly change is not a sum of separate deductions.

July 2026 No new matches Change 0 Rating 1,362

Rating-period composition

Rating matches
5 0
Record
4–1 Previous month 4–1
Opponents
5 0
Events
2 0

No matches were added or left the period. The change comes from the monthly revaluation of opponents across the full network.

June 2026 No new matches Change -6 Rating 1,362

Rating-period composition

Rating matches
5 0
Record
4–1 Previous month 4–1
Opponents
5 0
Events
2 0

No matches were added or left the period. The change comes from the monthly revaluation of opponents across the full network.

May 2026 No new matches Change -3 Rating 1,368

Rating-period composition

Rating matches
5 0
Record
4–1 Previous month 4–1
Opponents
5 0
Events
2 0

No matches were added or left the period. The change comes from the monthly revaluation of opponents across the full network.

April 2026 No new matches Change -2 Rating 1,371

Rating-period composition

Rating matches
5 0
Record
4–1 Previous month 4–1
Opponents
5 0
Events
2 0

No matches were added or left the period. The change comes from the monthly revaluation of opponents across the full network.

March 2026 No new matches Change 0 Rating 1,373

Rating-period composition

Rating matches
5 0
Record
4–1 Previous month 4–1
Opponents
5 0
Events
2 0

No matches were added or left the period. The change comes from the monthly revaluation of opponents across the full network.

February 2026 No new matches · 1 left period Change -49 Rating 1,373

Rating-period composition

Rating matches
5 -1
Record
4–1 Previous month 5–1
Opponents
5 -1
Events
2 -1

1 older matches left the 12-month period: 1 won and 0 lost. The rating is then recalculated across the full network, so the monthly change is not a sum of separate deductions.

January 2026 No new matches Change 0 Rating 1,422

Rating-period composition

Rating matches
6 0
Record
5–1 Previous month 5–1
Opponents
6 0
Events
3 0

No matches were added or left the period. The change comes from the monthly revaluation of opponents across the full network.

December 2025 No new matches Change +4 Rating 1,422

Rating-period composition

Rating matches
6 0
Record
5–1 Previous month 5–1
Opponents
6 0
Events
3 0

No matches were added or left the period. The change comes from the monthly revaluation of opponents across the full network.

November 2025 No new matches Change +17 Rating 1,418

Rating-period composition

Rating matches
6 0
Record
5–1 Previous month 5–1
Opponents
6 0
Events
3 0

No matches were added or left the period. The change comes from the monthly revaluation of opponents across the full network.

October 2025 2 new matches Change +21 Rating 1,401

Rating-period composition

Rating matches
6 +2
Record
5–1 Previous month 4–0
Opponents
6 +2
Events
3 +1

New rating matches

This is a current what-if estimate: roughly how much the current rating changes when this match is omitted. These values cannot be added and therefore do not together explain the monthly change.
Loss
October 12, 2025 Merlijn Frieser
Versus Contender 5 Boys NOGI 14-17 years / Professional / -80 kg
Method Points 04:00 0–0
Marginal influence -46
Win
October 12, 2025 Mikail Samet Karabulut
Versus Contender 5 Boys NOGI 14-17 years / Professional / -80 kg
Method Points 04:00 5–4
Marginal influence +65
September 2025 No new matches Change 0 Rating 1,380

Rating-period composition

Rating matches
4 0
Record
4–0 Previous month 4–0
Opponents
4 0
Events
2 0

No matches were added or left the period. The change comes from the monthly revaluation of opponents across the full network.

Relevant matches
1.7
Official ranking percentile
-
Performance
-

1.7 weighted matches against 2 different opponents across 1 events

Weighted win rate
-
Expected win rate
-
Average opponent rating
1,323
Repeated-opponent share
0.0%
Network connectivity
87.6%

Classification evidence

Why U18?

Within the published period from 2025-09-01 through 2026-08-31, only competition ages recorded at events in the calculation year determine this outcome, with at most one vote per event. Without such an age, the most recent unambiguous earlier competition age is projected to the calculation year; bracket evidence is the final fallback. The newest evidence breaks a tie.

Evidence outcome

  • U18 2 event votes Selected outcome

Registrations and outcomes

Grappling Industries AMSTERDAM
Does not count
No Gi Adult / Male / Intermediate (Blue) / Adult / -170 lbs
  • Competition age 18
Gi Adult / Male / Blue / Adult / -170 lbs
  • Competition age 18
BJJ Dutch Open 2026 NO-GI
Does not count
Adult Male (16+ years) / Blue belt / -79,5 kg
  • Competition age 18
Nijmegen Open BJJ 2026
Does not count
Male / Blue / Adult / -76 kg (Light)
  • Competition age 18
VERSUS Championship 35 - Adults Gi & NoGi
Does not count
Male No-Gi / Intermediate / -83
  • Competition age 18
GrappleCity: Rotterdam Summer Open
Does not count
Adult Nogi / Intermediate (Blue) / Adult / -79kg / Men
  • Competition age 18
Grappling Industries AMSTERDAM
Does not count
No Gi Adult / Male / Advanced (Purple/Brown/Black) / Adult / -170 lbs
  • Competition age 18
Gi Adult / Male / Blue / Adult / -170 lbs
  • Competition age 18
2026 AGF Netherlands Championships
Does not count
No Gi Juveniles - Adults / Male / Adult (18+) / Blue / Light (Up to 79.40 kg)
  • Competition age 18
Gi Juveniles - Adults / Male / Adult (18+) / Blue / Light (Up to 79.40 kg)
  • Competition age 18
Grappling Industries BRUSSELS
Does not count
No Gi Adult / Male / Intermediate (Blue) / Adult / -170 lbs
  • Competition age 18
Gi Adult / Male / Blue / Adult / -170 lbs
  • Competition age 18
Cauliflower Cup Circuit
Does not count
Male No-Gi / Blue / Adult / -79,5 kg (Middle)
  • Competition age 18
Male Gi / Blue / Adult / -76 kg (Light)
  • Competition age 18
COLOGNE WINTER OPEN CHAMPIONSHIP 2026 I EUROPEAN CUP
Does not count
Male Absolute No-Gi / Adult / Open Weight
  • Competition age 18
Male Absolute Gi / Adult / Open Weight
  • Competition age 18
Male No-Gi (over 16 y.o.) / White / Adult / -77,00 kg
  • Competition age 18
Male Gi (over 16 y.o.) / White / Adult / -77,00 kg
  • Competition age 18
VERSUS Championship 33 - NoGi & Adults only
Does not count
Male No-Gi / Intermediate / -76
  • Competition age 18
BJJ Dutch Open 2025
Does not count
Adult Male (16+ years) / White belt / -76 kg
  • Competition age 17
2025 AGF Amsterdam Open
Does not count
Gi Juveniles / Adults Challenger / Male / Adult (18+) / White / Challenger I (Up to 79.50 kg)
  • Competition age 17
Grappling Industries AMSTERDAM
Does not count
No Gi Adult / Male / Beginner (White) / Adult / -170 lbs
  • Competition age 17
Gi Adult / Male / White / Adult / -170 lbs
  • Competition age 17
2025 NO GI International Veluwe Open Jiu Jitsu Championship
Does not count
Male No-gi / White belts 6 + months experience / Adult / -76 kg (Light)
  • Competition age 17
Versus Contender 5
Does not count
Boys NOGI 14-17 years / Professional / -80 kg
  • Competition age 17
NAGA Europe Grappling Championship
U18 · Counts
Teens No-Gi (Male) / Expert / 70 - 74.9 / 16-17 years
  • Competition age 17
  • Registered age: u18
  • Source category: u18
Teens Gi (Male) / Expert / 70 - 74.9 / 16-17 years
  • Competition age 17
  • Registered age: u18
  • Source category: u18
VERSUS Championship 31 (NoGi)
Does not count
Beginner -76
  • Competition age 17
BRUSSELS OPEN 1 FBJJB RANKING *** ADULT GI & NoGi 20.09.2025
Does not count
Male No-Gi / White / Adult / -79,0 kg (Middle)
  • Competition age 17
Male Gi (16+) / White / Adult / -76 kg (Light)
  • Competition age 17
IBC 6000€ CASHPRIZE
Does not count
IBC Challenger NOGI / White / Adult / -76 kg (Light)
  • Competition age 17
IBC Challenger / White / Adult / -76 kg (Light)
  • Competition age 17
DÜSSELDORF FALL OPEN CHAMPIONSHIP 2025 I EUROPEAN CUP
U18 · Counts
Male No-Gi (over 16 y.o.) / White / Youth No-Gi / -81 kg (Heavy)
  • Competition age 17
  • Registered age: u18
  • Source category: u18
Male Gi (over 16 y.o.) / White / Youth (16-17y.o.) / -81 kg (Heavy)
  • Competition age 17
  • Registered age: u18
  • Source category: u18
Gelders Open BJJ
Does not count
Male Absolute / White / Adult / Absolute
  • Competition age 17
Male / White belts 6 + months experience / Adult / -76 kg (Light)
  • Competition age 17

Classification evidence

Why ≤ 80 kg?

This outcome uses at most one unambiguous upper weight limit per completed ranking event from 2025-09-01 through 2026-08-31. Only the three most recent eligible events are considered, and the lightest verified upper limit is selected. A higher division is not treated as measured body weight.

Evidence outcome

  • ≤ 80 kg 1 competition event Selected outcome

Registrations and outcomes

Grappling Industries AMSTERDAM
Does not count
No Gi Adult / Male / Intermediate (Blue) / Adult / -170 lbs
  • Registered weight class: -170 lbs
  • Source competition limit: -170 lbs

No matches in the rating period · no valid weight evidence

Grappling Industries AMSTERDAM
Does not count
Gi Adult / Male / Blue / Adult / -170 lbs
  • Registered weight class: -170 lbs
  • Source competition limit: -170 lbs

No matches in the rating period · no valid weight evidence

BJJ Dutch Open 2026 NO-GI
Does not count
Adult Male (16+ years) / Blue belt / -79,5 kg
  • Registered weight class: -79,5 kg
  • Source competition limit: -79,5 kg

No matches in the rating period · no valid weight evidence

Nijmegen Open BJJ 2026
Does not count
Male / Blue / Adult / -76 kg (Light)
  • Registered weight class: -76 kg (Light)
  • Source competition limit: -76 kg (Light)

No matches in the rating period · no valid weight evidence

VERSUS Championship 35 - Adults Gi & NoGi
Does not count
Male No-Gi / Intermediate / -83

No matches in the rating period · no valid weight evidence

GrappleCity: Rotterdam Summer Open
Does not count
Adult Nogi / Intermediate (Blue) / Adult / -79kg / Men
  • Registered weight class: -79kg
  • Source competition limit: -79kg

No matches in the rating period · no valid weight evidence

Grappling Industries AMSTERDAM
Does not count
No Gi Adult / Male / Advanced (Purple/Brown/Black) / Adult / -170 lbs
  • Registered weight class: -170 lbs
  • Source competition limit: -170 lbs

No matches in the rating period · no valid weight evidence

Grappling Industries AMSTERDAM
Does not count
Gi Adult / Male / Blue / Adult / -170 lbs
  • Registered weight class: -170 lbs
  • Source competition limit: -170 lbs

No matches in the rating period · no valid weight evidence

2026 AGF Netherlands Championships
Does not count
No Gi Juveniles - Adults / Male / Adult (18+) / Blue / Light (Up to 79.40 kg)
  • Registered weight class: Light (Up to 79.40 kg)
  • Source competition limit: Light (Up to 79.40 kg)

No matches in the rating period · no valid weight evidence

2026 AGF Netherlands Championships
Does not count
Gi Juveniles - Adults / Male / Adult (18+) / Blue / Light (Up to 79.40 kg)
  • Registered weight class: Light (Up to 79.40 kg)
  • Source competition limit: Light (Up to 79.40 kg)

No matches in the rating period · no valid weight evidence

Grappling Industries BRUSSELS
Does not count
No Gi Adult / Male / Intermediate (Blue) / Adult / -170 lbs
  • Registered weight class: -170 lbs
  • Source competition limit: -170 lbs

No matches in the rating period · no valid weight evidence

Grappling Industries BRUSSELS
Does not count
Gi Adult / Male / Blue / Adult / -170 lbs
  • Registered weight class: -170 lbs
  • Source competition limit: -170 lbs

No matches in the rating period · no valid weight evidence

Cauliflower Cup Circuit
Does not count
Male No-Gi / Blue / Adult / -79,5 kg (Middle)
  • Registered weight class: -79,5 kg (Middle)
  • Source competition limit: -79,5 kg (Middle)

No matches in the rating period · no valid weight evidence

Cauliflower Cup Circuit
Does not count
Male Gi / Blue / Adult / -76 kg (Light)
  • Registered weight class: -76 kg (Light)
  • Source competition limit: -76 kg (Light)

No matches in the rating period · no valid weight evidence

COLOGNE WINTER OPEN CHAMPIONSHIP 2026 I EUROPEAN CUP
Does not count
Male Absolute No-Gi / Adult / Open Weight
  • Registered weight class: Open Weight
  • Source competition limit: Open Weight

No matches in the rating period · no valid weight evidence

COLOGNE WINTER OPEN CHAMPIONSHIP 2026 I EUROPEAN CUP
Does not count
Male Absolute Gi / Adult / Open Weight
  • Registered weight class: Open Weight
  • Source competition limit: Open Weight

No matches in the rating period · no valid weight evidence

COLOGNE WINTER OPEN CHAMPIONSHIP 2026 I EUROPEAN CUP
Does not count
Male No-Gi (over 16 y.o.) / White / Adult / -77,00 kg
  • Registered weight class: -77,00 kg
  • Source competition limit: -77,00 kg

No matches in the rating period · no valid weight evidence

COLOGNE WINTER OPEN CHAMPIONSHIP 2026 I EUROPEAN CUP
Does not count
Male Gi (over 16 y.o.) / White / Adult / -77,00 kg
  • Registered weight class: -77,00 kg
  • Source competition limit: -77,00 kg

No matches in the rating period · no valid weight evidence

VERSUS Championship 33 - NoGi & Adults only
Does not count
Male No-Gi / Intermediate / -76

No matches in the rating period · no valid weight evidence

BJJ Dutch Open 2025
Does not count
Adult Male (16+ years) / White belt / -76 kg
  • Registered weight class: -76 kg
  • Source competition limit: -76 kg

No matches in the rating period · no valid weight evidence

2025 AGF Amsterdam Open
Does not count
Gi Juveniles / Adults Challenger / Male / Adult (18+) / White / Challenger I (Up to 79.50 kg)
  • Registered weight class: Challenger I (Up to 79.50 kg)
  • Source competition limit: Challenger I (Up to 79.50 kg)

No matches in the rating period · no valid weight evidence

Grappling Industries AMSTERDAM
Does not count
No Gi Adult / Male / Beginner (White) / Adult / -170 lbs
  • Registered weight class: -170 lbs
  • Source competition limit: -170 lbs

No matches in the rating period · no valid weight evidence

Grappling Industries AMSTERDAM
Does not count
Gi Adult / Male / White / Adult / -170 lbs
  • Registered weight class: -170 lbs
  • Source competition limit: -170 lbs

No matches in the rating period · no valid weight evidence

2025 NO GI International Veluwe Open Jiu Jitsu Championship
Does not count
Male No-gi / White belts 6 + months experience / Adult / -76 kg (Light)
  • Registered weight class: -76 kg (Light)
  • Source competition limit: -76 kg (Light)

No matches in the rating period · no valid weight evidence

Versus Contender 5
≤ 80 kg · Counts as a competition event
Boys NOGI 14-17 years / Professional / -80 kg
  • Registered weight class: -80 kg
  • Source competition limit: -80 kg

2 matches in the rating period

NAGA Europe Grappling Championship
Does not count
Teens No-Gi (Male) / Expert / 70 - 74.9 / 16-17 years
  • Registered weight class: 70 - 74.9
  • Source competition limit: 70 - 74.9

No matches in the rating period · no valid weight evidence

NAGA Europe Grappling Championship
Does not count
Teens Gi (Male) / Expert / 70 - 74.9 / 16-17 years
  • Registered weight class: 70 - 74.9
  • Source competition limit: 70 - 74.9

No matches in the rating period · no valid weight evidence

VERSUS Championship 31 (NoGi)
Does not count
Beginner -76

No matches in the rating period · no valid weight evidence

BRUSSELS OPEN 1 FBJJB RANKING *** ADULT GI & NoGi 20.09.2025
Does not count
Male No-Gi / White / Adult / -79,0 kg (Middle)
  • Registered weight class: -79,0 kg (Middle)
  • Source competition limit: -79,0 kg (Middle)

No matches in the rating period · no valid weight evidence

BRUSSELS OPEN 1 FBJJB RANKING *** ADULT GI & NoGi 20.09.2025
Does not count
Male Gi (16+) / White / Adult / -76 kg (Light)
  • Registered weight class: -76 kg (Light)
  • Source competition limit: -76 kg (Light)

No matches in the rating period · no valid weight evidence

IBC 6000€ CASHPRIZE
Does not count
IBC Challenger NOGI / White / Adult / -76 kg (Light)
  • Registered weight class: -76 kg (Light)
  • Source competition limit: -76 kg (Light)

No matches in the rating period · no valid weight evidence

IBC 6000€ CASHPRIZE
Does not count
IBC Challenger / White / Adult / -76 kg (Light)
  • Registered weight class: -76 kg (Light)
  • Source competition limit: -76 kg (Light)

No matches in the rating period · no valid weight evidence

DÜSSELDORF FALL OPEN CHAMPIONSHIP 2025 I EUROPEAN CUP
Does not count
Male No-Gi (over 16 y.o.) / White / Youth No-Gi / -81 kg (Heavy)
  • Registered weight class: -81 kg (Heavy)
  • Source competition limit: -81 kg (Heavy)

No matches in the rating period · no valid weight evidence

DÜSSELDORF FALL OPEN CHAMPIONSHIP 2025 I EUROPEAN CUP
Does not count
Male Gi (over 16 y.o.) / White / Youth (16-17y.o.) / -81 kg (Heavy)
  • Registered weight class: -81 kg (Heavy)
  • Source competition limit: -81 kg (Heavy)

No matches in the rating period · no valid weight evidence

Gelders Open BJJ
Does not count
Male Absolute / White / Adult / Absolute
  • Registered weight class: Absolute
  • Source competition limit: Absolute

No matches in the rating period · no valid weight evidence

Gelders Open BJJ
Does not count
Male / White belts 6 + months experience / Adult / -76 kg (Light)
  • Registered weight class: -76 kg (Light)
  • Source competition limit: -76 kg (Light)

No matches in the rating period · no valid weight evidence