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Rafael Martins Jaco

Satsang BJJ

W–L
0–3
Won and lost rating-eligible matches in the past 12 months.
Gi
1,121
Rating based on Gi matches in the past 12 months.
No-Gi
-
Rating based on No-Gi matches in the past 12 months.
Current form
0–3
Results from the ten most recent rating-eligible matches.
Opponents
3
Unique opponents faced in rating-eligible matches in the past 12 months.

Indexed career

Matches

3
Indexed competition matches
Date Opponent Result Event Division
2026-05-23 Bruce Broekhuizen
Loss
GrappleCity: Rotterdam Summer Open Gi · Teens Gi / Yellow/Orange / 12-13 years / -40kg / Boy
2026-02-22 Thibault Verschueren
Loss
GrappleCity: Rotterdam Spring Open Gi · Teens Gi / Yellow/Orange / 12-13 years / -45kg / Boy
2026-02-22 Fellipe Cardoso Rodrigues
Loss
GrappleCity: Rotterdam Spring Open Gi · Teens Gi / Yellow/Orange / 12-13 years / -45kg / Boy

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 Change +1 Rating 1,121

Rating-period composition

Rating matches
3 0
Record
0–3 Previous month 0–3
Opponents
3 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.

July 2026 No new matches Change -1 Rating 1,120

Rating-period composition

Rating matches
3 0
Record
0–3 Previous month 0–3
Opponents
3 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 +5 Rating 1,121

Rating-period composition

Rating matches
3 0
Record
0–3 Previous month 0–3
Opponents
3 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 1 new match Change 0 Rating 1,116

Rating-period composition

Rating matches
3 +1
Record
0–3 Previous month 0–2
Opponents
3 +1
Events
2 +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
May 23, 2026 Bruce Broekhuizen
GrappleCity: Rotterdam Summer Open Teens Gi / Yellow/Orange / 12-13 years / -40kg / Boy
Method Submission 00:23 0–0
Marginal influence -15
April 2026 No new matches Change -4 Rating 1,116

Rating-period composition

Rating matches
2 0
Record
0–2 Previous month 0–2
Opponents
2 0
Events
1 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 1,120

Rating-period composition

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

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

February 2026 2 new matches Change Starting point Rating 1,120

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
February 22, 2026 Thibault Verschueren
GrappleCity: Rotterdam Spring Open Teens Gi / Yellow/Orange / 12-13 years / -45kg / Boy
Method Submission 00:39 0–0
Marginal influence -18
Loss
February 22, 2026 Fellipe Cardoso Rodrigues
GrappleCity: Rotterdam Spring Open Teens Gi / Yellow/Orange / 12-13 years / -45kg / Boy
Method Submission 01:16 1–9
Marginal influence -33
Relevant matches
2.7
Official ranking percentile
-
Performance
-

2.7 weighted matches against 3 different opponents across 2 events

Weighted win rate
-
Expected win rate
-
Average opponent rating
1,561
Repeated-opponent share
0.0%
Network connectivity
87.6%

Classification evidence

Why U14?

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

  • U14 2 event votes Selected outcome

Registrations and outcomes

GrappleCity: Rotterdam Summer Open
U14 · Counts
Teens Gi / Yellow/Orange / 12-13 years / -40kg / Boy
  • Competition age 13
  • Registered age: u14
  • Source category: u14
GrappleCity: Rotterdam Spring Open
U14 · Counts
Teens Gi / Yellow/Orange / 12-13 years / -45kg / Boy
  • Competition age 13
  • Registered age: u14
  • Source category: u14

Classification evidence

Why ≤ 40 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

  • ≤ 40 kg 1 competition event Selected outcome
  • ≤ 45 kg 1 competition event

Registrations and outcomes

GrappleCity: Rotterdam Summer Open
≤ 40 kg · Counts as a competition event
Teens Gi / Yellow/Orange / 12-13 years / -40kg / Boy
  • Registered weight class: -40kg
  • Source competition limit: -40kg

1 match in the rating period

GrappleCity: Rotterdam Spring Open
≤ 45 kg · Counts as a competition event
Teens Gi / Yellow/Orange / 12-13 years / -45kg / Boy
  • Registered weight class: -45kg
  • Source competition limit: -45kg

2 matches in the rating period

Classification evidence

Why Orange?

This outcome uses the belt category of every rating-eligible match from 2025-09-01 through 2026-08-31. The most-fought category is selected; the newest evidence breaks a tie.

Evidence outcome

  • orange 3 matches in the rating period Selected outcome

Registrations and outcomes

GrappleCity: Rotterdam Summer Open
orange · Counts as a match
Teens Gi / Yellow/Orange / 12-13 years / -40kg / Boy
  • Source belt category: orange

1 match in the rating period

GrappleCity: Rotterdam Spring Open
orange · Counts as a match
Teens Gi / Yellow/Orange / 12-13 years / -45kg / Boy
  • Source belt category: orange

2 matches in the rating period