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Aaron Kempka

Fennec Jiu Jitsu

W–L
2–3
Won and lost rating-eligible matches in the past 12 months.
Gi
1,175
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
2–3
Results from the ten most recent rating-eligible matches.
Opponents
3
Unique opponents faced in rating-eligible matches in the past 12 months.

Honours

Medals and placements

Gold
1
Silver
0
Bronze
0
Total medals
1
Events with results
2

Full career record

Wins
2
Losses
3
Matches
5
Win rate
40.0%

Ways of winning

Submission
0
Points
1
Decision
1
Disqualification
0

Personal records

Longest winning streak
2
Longest gold streak
1

Recent recorded placements

12-month performance profile

How the results were achieved

Past 12 months
Current win streak
0
Unique opponents
3
Distinct events
2

Ways of winning

  • Submission 0 0%
  • Points 1 50%
  • Decision 1 50%
  • Other recorded result 0 0%

Gi versus No-Gi

Gi

Rating
1175
Record
2–3
Win rate
40%
Submission share
0%

No-Gi

Rating
-
Record
-
Win rate
-
Submission share
-

Win quality

Grouped by pre-match win probability. This provides context and does not award an extra rating bonus.

As underdog 0–0 Less than 35% expected win probability before the match.
Even match 0–0 Between 35% and 65% expected win probability before the match.
As favourite 0–0 More than 65% expected win probability before the match.

Development

Rating and development

The same published rating, supported by trend, opponent strength and evidence quality.

Current rating
1,175
Change over 90 days
-41
Highest rating in 12 months
1,221
Performance versus expectation
-
Schedule strength
-
Average opponent rating
1,275
Weighted win rate
-
Expected win rate
-
Repeat-opponent share
40%
Effective evidence
3
Confidence
49/100

Opponents

Opposition and rivalries

The strongest recorded win, rematches and opponents faced repeatedly.

Rematches 2–1 2–1 across 3 rematches against 1 repeat opponents.

Rivals

Opponent Head-to-head record Matches
Alex Zaytsev 2–1 3

Recent tournaments

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 1,175

Rating-period composition

Rating matches
5 0
Record
2–3 Previous month 2–3
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 -5 Rating 1,176

Rating-period composition

Rating matches
5 0
Record
2–3 Previous month 2–3
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 +1 Rating 1,181

Rating-period composition

Rating matches
5 0
Record
2–3 Previous month 2–3
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 No new matches Change 0 Rating 1,180

Rating-period composition

Rating matches
5 0
Record
2–3 Previous month 2–3
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.

April 2026 2 new matches Change -54 Rating 1,180

Rating-period composition

Rating matches
5 +2
Record
2–3 Previous month 2–1
Opponents
3 +2
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
April 11, 2026 David Perez Martinez
Fennec BJJ Kids Cup Vol. 9 Gi & NoGi Boys Gi (under 16 y.o.) / White / 4-5 years / -24 kg
Method Points 02:00 2–6
Marginal influence -46
Loss
April 11, 2026 Theo Estevo Lukow
Fennec BJJ Kids Cup Vol. 9 Gi & NoGi Boys Gi (under 16 y.o.) / White / 4-5 years / -24 kg
Method Submission 01:15 2–0
Marginal influence -35
March 2026 No new matches Change 0 Rating 1,234

Rating-period composition

Rating matches
3 0
Record
2–1 Previous month 2–1
Opponents
1 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 No new matches Change 0 Rating 1,234

Rating-period composition

Rating matches
3 0
Record
2–1 Previous month 2–1
Opponents
1 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.

January 2026 No new matches Change 0 Rating 1,234

Rating-period composition

Rating matches
3 0
Record
2–1 Previous month 2–1
Opponents
1 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.

December 2025 No new matches Change +13 Rating 1,234

Rating-period composition

Rating matches
3 0
Record
2–1 Previous month 2–1
Opponents
1 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.

November 2025 3 new matches Change Starting point Rating 1,221

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.
Win
November 22, 2025 Alex Zaytsev
Fennec BJJ Kids Cup Gi & NoGi Boys Gi (under 16 y.o.) / White / 4-5 years / -21 kg
Method Points 02:00 6–2
Marginal influence +30
Win
November 22, 2025 Alex Zaytsev
Fennec BJJ Kids Cup Gi & NoGi Boys Gi (under 16 y.o.) / White / 4-5 years / -21 kg
Method Decision 02:00 4–4
Marginal influence +30
Loss
November 22, 2025 Alex Zaytsev
Fennec BJJ Kids Cup Gi & NoGi Boys Gi (under 16 y.o.) / White / 4-5 years / -21 kg
Method Points 02:00 0–10
Marginal influence -19
Relevant matches
3
Official ranking percentile
-
Performance
-

3 weighted matches against 3 different opponents across 2 events

Weighted win rate
-
Expected win rate
-
Average opponent rating
1,275
Repeated-opponent share
40.0%
Network connectivity
87.6%

Classification evidence

Why U8?

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

  • U8 1 event vote Selected outcome

Registrations and outcomes

Fennec BJJ Kids Cup Vol. 9 Gi & NoGi
U8 · Counts
Boys Gi (under 16 y.o.) / White / 4-5 years / -24 kg
  • Competition age 6
  • Registered age: u8
  • Source category: u8
Fennec BJJ Kids Cup Gi & NoGi
Does not count
Boys Gi (under 16 y.o.) / White / 4-5 years / -21 kg
  • Competition age 5
  • Registered age: u8
  • Source category: u8

Classification evidence

Why ≤ 21 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

  • ≤ 21 kg 1 competition event Selected outcome
  • ≤ 24 kg 1 competition event

Registrations and outcomes

Fennec BJJ Kids Cup Vol. 9 Gi & NoGi
≤ 24 kg · Counts as a competition event
Boys Gi (under 16 y.o.) / White / 4-5 years / -24 kg
  • Registered weight class: -24 kg
  • Source competition limit: -24 kg

2 matches in the rating period

Fennec BJJ Kids Cup Gi & NoGi
≤ 21 kg · Counts as a competition event
Boys Gi (under 16 y.o.) / White / 4-5 years / -21 kg
  • Registered weight class: -21 kg
  • Source competition limit: -21 kg

3 matches in the rating period

Classification evidence

Why White?

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

  • white 5 matches in the rating period Selected outcome

Registrations and outcomes

Fennec BJJ Kids Cup Vol. 9 Gi & NoGi
white · Counts as a match
Boys Gi (under 16 y.o.) / White / 4-5 years / -24 kg
  • Source belt category: white

2 matches in the rating period

Fennec BJJ Kids Cup Gi & NoGi
white · Counts as a match
Boys Gi (under 16 y.o.) / White / 4-5 years / -21 kg
  • Source belt category: white

3 matches in the rating period