Jun Koo
| Club | Ritterkunst Fechtschule |
| Nationality | United States |
Ratings
| Category | Last competed | Rank (current) | Weighted Rating (current) | Rank (best) | Weighted Rating (best) |
|---|---|---|---|---|---|
| Longsword | |||||
| - Mixed & Men's Steel Longsword | June 2026 | 2524 (top 31%) | 1267.3 | 2437 (June 2026) | 1270.9 (June 2026) |
| Single Rapier | |||||
| - Mixed & Men's Steel Single Rapier | September 2025 | 1480 (top 70%) | 994.2 | 1283 (September 2025) | 1001.6 (September 2025) |
Record
| Division | Total | Win | Loss | Draw | Other |
|---|---|---|---|---|---|
| Mixed Steel Longsword | 12 | 7 | 4 | 1 | 0 |
| Mixed Steel Single Rapier | 4 | 1 | 3 | 0 | 0 |
| Sum | 16 | 8 | 7 | 1 | 0 |
Full rating histories
Mixed & Men's Steel Longsword
September 2025
3901
1076.6
0
October 2025
3960
1076
1
-0.6
November 2025
4050
1075.5
2
-0.5
December 2025
4097
1074.9
3
-0.5
January 2026
4118
1074.4
4
-0.5
February 2026
4172
1073.8
5
-0.5
March 2026
4260
1073.3
6
-0.5
April 2026
4383
1072.7
7
-0.5
May 2026
4550
1072.2
8
-0.5
June 2026
2437
1270.9
0
198.7
July 2026
2467
1270
1
-0.9
August 2026
2511
1269.1
2
-0.9
September 2026
2562
1268.2
3
-0.9
October 2026
2524
1267.3
4
-0.9
Mixed & Men's Steel Single Rapier
September 2025
1283
1001.6
0
October 2025
1337
1001
1
-0.6
November 2025
1364
1000.4
2
-0.6
December 2025
1379
999.8
3
-0.6
January 2026
1406
999.3
4
-0.6
February 2026
1407
998.7
5
-0.6
March 2026
1470
998.1
6
-0.6
April 2026
1500
997.6
7
-0.6
May 2026
1463
997
8
-0.6
June 2026
1464
996.4
9
-0.6
July 2026
1478
995.9
10
-0.6
August 2026
1523
995.3
11
-0.6
September 2026
1531
994.8
12
-0.6
October 2026
1480
994.2
13
-0.6
Match results
Mixed & Men's Steel Longsword - 12 fights
June 2026 - South East Renaissance Fencing Open 2026
South East Renaissance Fencing Open 2026
| Division | Stage | Opponent | Outcome | Opponent rating | Win chance |
|---|---|---|---|---|---|
| Mixed Steel Longsword (Tier C) | Bronze Medal Match | Adrian Zaniesienko | LOSS | 1120.62 | 55% |
| Mixed Steel Longsword (Tier C) | Pools | Will Anderson | DRAW | 565.65 | 69% |
| Mixed Steel Longsword (Tier C) | Pools | Amanda DeWitt | WIN | 624.19 | 70% |
| Mixed Steel Longsword (Tier C) | Pools | Jay Luo | WIN | 1091.91 | 61% |
| Mixed Steel Longsword (Tier C) | Pools | Devin Sangster | WIN | 1029.61 | 58% |
| Mixed Steel Longsword (Tier C) | Semifinals | Colin Glaves | LOSS | 1121.08 | 49% |
| Mixed Steel Longsword (Tier C) | Top 16 | Joshua Palmer | WIN | Unrated | |
| Mixed Steel Longsword (Tier C) | Top 32 | Zach Robinson | WIN | 989.84 | 56% |
| Mixed Steel Longsword (Tier C) | Top 8 | Alec Jackson | WIN | 1101.30 | 52% |
September 2025 - Double Barrel Classic 2025
Double Barrel Classic 2025
| Division | Stage | Opponent | Outcome | Opponent rating | Win chance |
|---|---|---|---|---|---|
| Mixed Steel Longsword | Pool 2 | Sean Lewis | LOSS | 1400.97 | |
| Mixed Steel Longsword | Pool 2 | Micah Webb | WIN | 1118.39 | |
| Mixed Steel Longsword | Pool 2 | Cameron Fulco | LOSS | 1557.03 |
Mixed & Men's Steel Single Rapier - 4 fights
September 2025 - Double Barrel Classic 2025
Double Barrel Classic 2025
| Division | Stage | Opponent | Outcome | Opponent rating | Win chance |
|---|---|---|---|---|---|
| Mixed Steel Single Rapier | Pool 2 | Keith Hamm | LOSS | 1531.07 | |
| Mixed Steel Single Rapier | Pool 2 | Thomas Harding IV | WIN | Unrated | |
| Mixed Steel Single Rapier | Pool 2 | Lawrence Robinson | LOSS | Unrated | |
| Mixed Steel Single Rapier | Rd of 16 | Michael Roth | LOSS | 1327.16 |