| JaMaRIO vs King | 17–17 | 50.00% |
| JaMaRIO vs Hwoarang | 8–10 | 44.44% |
| JaMaRIO vs Reina | 12–5 | 70.59% |
| JaMaRIO vs Dragunov | 6–10 | 37.50% |
| JaMaRIO vs Bryan | 7–8 | 46.67% |
| JaMaRIO vs Asuka | 10–5 | 66.67% |
| JaMaRIO vs Lili | 9–4 | 69.23% |
| JaMaRIO vs Jin | 8–4 | 66.67% |
| JaMaRIO vs Clive | 8–4 | 66.67% |
| JaMaRIO vs Law | 6–5 | 54.55% |
| JaMaRIO vs Xiaoyu | 7–4 | 63.64% |
| JaMaRIO vs Steve | 5–6 | 45.45% |
| JaMaRIO vs Kazuya | 7–3 | 70.00% |
| JaMaRIO vs Claudio | 6–4 | 60.00% |
| JaMaRIO vs Leroy | 8–2 | 80.00% |
| JaMaRIO vs Fahkumram | 1–9 | 10.00% |
| JaMaRIO vs Jack-8 | 3–6 | 33.33% |
| JaMaRIO vs Leo | 6–3 | 66.67% |
| JaMaRIO vs Eddy | 5–4 | 55.56% |
| JaMaRIO vs Feng | 6–2 | 75.00% |
| JaMaRIO vs Shaheen | 6–2 | 75.00% |
| JaMaRIO vs Lee | 4–4 | 50.00% |
| JaMaRIO vs Heihachi | 4–4 | 50.00% |
| JaMaRIO vs Armor King | 3–5 | 37.50% |
| JaMaRIO vs Yoshimitsu | 6–1 | 85.71% |
| JaMaRIO vs Lars | 2–5 | 28.57% |
| JaMaRIO vs Nina | 4–3 | 57.14% |
| JaMaRIO vs Jun | 5–2 | 71.43% |
| JaMaRIO vs Anna | 4–3 | 57.14% |
| JaMaRIO vs Kuma | 4–2 | 66.67% |
| JaMaRIO vs Azucena | 3–3 | 50.00% |
| JaMaRIO vs Victor | 3–3 | 50.00% |
| JaMaRIO vs Lidia | 2–4 | 33.33% |
| JaMaRIO vs Devil Jin | 4–1 | 80.00% |
| JaMaRIO vs Alisa | 2–0 | 100.00% |
| JaMaRIO vs Panda | 2–0 | 100.00% |
| JaMaRIO vs Paul | 1–0 | 100.00% |
| JaMaRIO vs Raven | 0–1 | 0.00% |
Limitations
This data is often requested to give insight into which characters you have more trouble with than others, but it is not particularly helpful for that. The main issue is that it is heavily skewed by how strong the opponents you play are.
For example, this data suggests my worst matchup is clearly vs Reina, but that's just because most of those games are vs Yagami.
There is a way to account for this being worked on. The central idea is to assign each matchup a rating vs you which adjusts based on the result, much like the regular rating but also based on the rating of each player. With this, it would give a better summary of how well you perform vs each character.
In the meantime, this page is here to present the data as requested.