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Devin Kupka

Oni Böblingen

W–L
6–8
Won and lost rating-eligible matches in the past 12 months.
Gi
1,232
Rating based on Gi matches in the past 12 months.
No-Gi
1,284
Rating based on No-Gi matches in the past 12 months.
Current form
5–5
Results from the ten most recent rating-eligible matches.
Opponents
9
Unique opponents faced in rating-eligible matches in the past 12 months.

Honours

Medals and placements

Gold
1
Silver
3
Bronze
1
Total medals
5
Events with results
5

Full career record

Wins
7
Losses
10
Matches
17
Win rate
41.2%

Ways of winning

Submission
6
Points
0
Decision
1
Disqualification
0

Personal records

Longest winning streak
3
Longest submission streak
3

Recent recorded placements

12-month performance profile

How the results were achieved

Past 12 months
Current win streak
0
Unique opponents
9
Distinct events
3

Ways of winning

  • Submission 6 100%
  • Points 0 0%
  • Decision 0 0%
  • Other recorded result 0 0%

Gi versus No-Gi

Gi

Rating
1232
Record
2–3
Win rate
40%
Submission share
100%

No-Gi

Rating
1284
Record
4–5
Win rate
44%
Submission share
100%

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
1,331
Change over 90 days
+199
Highest rating in 12 months
1,329
Performance versus expectation
+2.3 pp
Schedule strength
Top 24%
Average opponent rating
1,364
Weighted win rate
46%
Expected win rate
44%
Repeat-opponent share
36%
Effective evidence
9.8
Confidence
91/100

Opponents

Opposition and rivalries

The strongest recorded win, rematches and opponents faced repeatedly.

Rematches 3–5 3–5 across 8 rematches against 3 repeat opponents.

Top 10 highest-ranked defeated opponents

Past 12 months

  1. #505 Kacper Sobczak · Southside Battle Trials 2026 - Kinder und Jugendliche Sub 00:29 2–0
  2. #989 Rafael Feller Andrade · Grappling Industries NUREMBERG Sub 01:14 6–0
  3. #1072 Njegoš Irić · Southside Battle Trials 2026 - Kinder und Jugendliche Sub 00:30 5–0 Earlier · Sub 01:31 2–0 May 10, 2026 · Southside Battle Trials 2026 - Kinder und Jugendliche

Full career

  1. #505 Kacper Sobczak · Southside Battle Trials 2026 - Kinder und Jugendliche Sub 00:29 2–0
  2. #989 Rafael Feller Andrade · Grappling Industries NUREMBERG Sub 01:14 6–0
  3. #1072 Njegoš Irić · Southside Battle Trials 2026 - Kinder und Jugendliche Sub 00:30 5–0 Earlier · Sub 01:31 2–0 May 10, 2026 · Southside Battle Trials 2026 - Kinder und Jugendliche

Rivals

Opponent Head-to-head record Matches
Kacper Sobczak 1–1 2
Njegoš Irić 2–0 2

Around this athlete

Athlete Rank Rating
Owen Payne #736 1,331
Devin Kupka #737 1,331
Zulfikar Chkair #738 1,331

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 1,331

Rating-period composition

Rating matches
14 0
Record
6–8 Previous month 6–8
Opponents
9 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.

July 2026 No new matches Change 0 Rating 1,332

Rating-period composition

Rating matches
14 0
Record
6–8 Previous month 6–8
Opponents
9 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.

June 2026 No new matches Change +3 Rating 1,332

Rating-period composition

Rating matches
14 0
Record
6–8 Previous month 6–8
Opponents
9 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.

May 2026 10 new matches Change +185 Rating 1,329

Rating-period composition

Rating matches
14 +10
Record
6–8 Previous month 1–3
Opponents
9 +5
Events
3 +2

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 Malik Dastageeri
NAGA Germany Grappling Championship Children Gi (Male) / Beginner / 50 - 54.9 / 12-13 years
Method Submission 02:41 0–9
Marginal influence -5
Loss
May 23, 2026 Malik Dastageeri
NAGA Germany Grappling Championship Children Gi (Male) / Beginner / 50 - 54.9 / 12-13 years
Method Points 03:00 0–9
Marginal influence -5
Loss
May 23, 2026 Malik Dastageeri
NAGA Germany Grappling Championship Children No-Gi (Male) / Beginner / 50 - 54.9 / 12-13 years
Method Points 03:00 0–7
Marginal influence -7
Loss
May 23, 2026 Malik Dastageeri
NAGA Germany Grappling Championship Children No-Gi (Male) / Beginner / 50 - 54.9 / 12-13 years
Method Points 03:00 0–2
Marginal influence -7
Win
May 10, 2026 Finn Pohlmann
Southside Battle Trials 2026 - Kinder und Jugendliche U13 - male NoGi / U13 - Male - NoGi - Alter 10 Jahre bis 12 Jahre / -53 kg
Method Submission 01:01 4–0
Marginal influence +16
Win
May 10, 2026 Kacper Sobczak
Southside Battle Trials 2026 - Kinder und Jugendliche U13 - male NoGi / U13 - Male - NoGi - Alter 10 Jahre bis 12 Jahre / -53 kg
Method Submission 00:29 2–0
Marginal influence +16
Win
May 10, 2026 Njegoš Irić
Southside Battle Trials 2026 - Kinder und Jugendliche U13 - male NoGi / U13 - Male - NoGi - Alter 10 Jahre bis 12 Jahre / -53 kg
Method Submission 00:30 5–0
Marginal influence +15
Win
May 10, 2026 Kevin Wiedemann
Southside Battle Trials 2026 - Kinder und Jugendliche U13 - male Gi / U13 - Male - Gi - Alter 10 Jahre bis 12 Jahre / -55 kg
Method Submission 00:36 6–0
Marginal influence +9
Loss
May 10, 2026 Kacper Sobczak
Southside Battle Trials 2026 - Kinder und Jugendliche U13 - male Gi / U13 - Male - Gi - Alter 10 Jahre bis 12 Jahre / -55 kg
Method Disqualification 00:09 0–0
Marginal influence -10
Win
May 10, 2026 Njegoš Irić
Southside Battle Trials 2026 - Kinder und Jugendliche U13 - male Gi / U13 - Male - Gi - Alter 10 Jahre bis 12 Jahre / -55 kg
Method Submission 01:31 2–0
Marginal influence +8
April 2026 No new matches Change 0 Rating 1,144

Rating-period composition

Rating matches
4 0
Record
1–3 Previous month 1–3
Opponents
4 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 4 new matches · 1 left period Change +14 Rating 1,144

Rating-period composition

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

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

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
March 14, 2026 Joshua Schmidt
Grappling Industries NUREMBERG No Gi Kids / Advanced (Yellow/Orange) / 12 - 13 years (Male) / -115 lbs
Method Submission 02:24 0–17
Marginal influence -12
Loss
March 14, 2026 Lukas Schnabel
Grappling Industries NUREMBERG No Gi Kids / Advanced (Yellow/Orange) / 12 - 13 years (Male) / -115 lbs
Method Points 03:00 2–12
Marginal influence -17
Loss
March 14, 2026 Zaur Fotiadi
Grappling Industries NUREMBERG No Gi Kids / Advanced (Yellow/Orange) / 12 - 13 years (Male) / -115 lbs
Method Submission 00:36 0–6
Marginal influence -10
Win
Grappling Industries NUREMBERG No Gi Kids / Advanced (Yellow/Orange) / 12 - 13 years (Male) / -115 lbs
Method Submission 01:14 6–0
Marginal influence +10
Relevant matches
9.8
Official ranking percentile
Top 50%
Performance
2.3 pp above expectation

9.8 weighted matches against 9 different opponents across 3 events

Weighted win rate
46.1%
Expected win rate
43.9%
Average opponent rating
1,364
Repeated-opponent share
35.7%
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 3 event votes Selected outcome

Registrations and outcomes

NAGA Germany Grappling Championship
U14 · Counts
2 Adult 13 & Up Spectator tickets
Children No-Gi (Male) / Beginner / 50 - 54.9 / 12-13 years
  • Competition age 13
  • Registered age: u14
  • Source category: u14
Children Gi (Male) / Beginner / 50 - 54.9 / 12-13 years
  • Competition age 13
  • Registered age: u14
  • Source category: u14
Southside Battle Trials 2026 - Kinder und Jugendliche
U14 · Counts
U13 - male NoGi / U13 - Male - NoGi - Alter 10 Jahre bis 12 Jahre / -53 kg
  • Competition age 13
  • Registered age: u12
  • Source category: u12
U13 - male Gi / U13 - Male - Gi - Alter 10 Jahre bis 12 Jahre / -55 kg
  • Competition age 13
  • Registered age: u12
  • Source category: u12
Grappling Industries NUREMBERG
U14 · Counts
No Gi Kids / Advanced (Yellow/Orange) / 12 - 13 years (Male) / -115 lbs
  • Competition age 13
  • Registered age: u14
  • Source category: u14
Southside Battle Trials 2025 - Kinder und Jugendliche
Does not count
U13 - male NoGi / U13 - Male Gi - Alter 10 Jahre bis 12 Jahre / -45 kg
  • Competition age 12
  • Registered age: u12
  • Source category: u12

Classification evidence

Why ≤ 52 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

  • ≤ 52 kg 1 competition event Selected outcome
  • ≤ 55 kg 1 competition event

Registrations and outcomes

NAGA Germany Grappling Championship
Does not count
2 Adult 13 & Up Spectator tickets

No matches in the rating period · no valid weight evidence

NAGA Germany Grappling Championship
≤ 55 kg · Counts as a competition event
Children No-Gi (Male) / Beginner / 50 - 54.9 / 12-13 years
  • Registered weight class: 50 - 54.9
  • Source competition limit: 50 - 54.9

2 matches in the rating period

NAGA Germany Grappling Championship
≤ 55 kg · Counts as a competition event
Children Gi (Male) / Beginner / 50 - 54.9 / 12-13 years
  • Registered weight class: 50 - 54.9
  • Source competition limit: 50 - 54.9

2 matches in the rating period

Southside Battle Trials 2026 - Kinder und Jugendliche
≤ 53 kg · Does not count
U13 - male NoGi / U13 - Male - NoGi - Alter 10 Jahre bis 12 Jahre / -53 kg
  • Registered weight class: -53 kg
  • Source competition limit: -53 kg

3 matches in the rating period · conflicting upper weight limits make this event ambiguous

Southside Battle Trials 2026 - Kinder und Jugendliche
≤ 55 kg · Does not count
U13 - male Gi / U13 - Male - Gi - Alter 10 Jahre bis 12 Jahre / -55 kg
  • Registered weight class: -55 kg
  • Source competition limit: -55 kg

3 matches in the rating period · conflicting upper weight limits make this event ambiguous

Grappling Industries NUREMBERG
≤ 52 kg · Counts as a competition event
No Gi Kids / Advanced (Yellow/Orange) / 12 - 13 years (Male) / -115 lbs
  • Registered weight class: -115 lbs
  • Source competition limit: -115 lbs

4 matches in the rating period

Southside Battle Trials 2025 - Kinder und Jugendliche
Does not count
U13 - male NoGi / U13 - Male Gi - Alter 10 Jahre bis 12 Jahre / -45 kg
  • Registered weight class: -45 kg
  • Source competition limit: -45 kg

No matches in the rating period · no valid weight evidence

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 4 matches in the rating period Selected outcome

Registrations and outcomes

Grappling Industries NUREMBERG
orange · Counts as a match
No Gi Kids / Advanced (Yellow/Orange) / 12 - 13 years (Male) / -115 lbs
  • Source belt category: orange

4 matches in the rating period