| Jammyyy vs Kazuya | 108–145 | 42.69% |
| Jammyyy vs King | 94–127 | 42.53% |
| Jammyyy vs Reina | 77–112 | 40.74% |
| Jammyyy vs Jin | 81–107 | 43.09% |
| Jammyyy vs Hwoarang | 66–101 | 39.52% |
| Jammyyy vs Law | 69–90 | 43.40% |
| Jammyyy vs Bryan | 62–81 | 43.36% |
| Jammyyy vs Heihachi | 49–94 | 34.27% |
| Jammyyy vs Steve | 70–66 | 51.47% |
| Jammyyy vs Lili | 52–65 | 44.44% |
| Jammyyy vs Jun | 48–62 | 43.64% |
| Jammyyy vs Devil Jin | 39–68 | 36.45% |
| Jammyyy vs Yoshimitsu | 47–56 | 45.63% |
| Jammyyy vs Dragunov | 40–63 | 38.83% |
| Jammyyy vs Nina | 46–52 | 46.94% |
| Jammyyy vs Azucena | 42–42 | 50.00% |
| Jammyyy vs Paul | 29–53 | 35.37% |
| Jammyyy vs Xiaoyu | 37–42 | 46.84% |
| Jammyyy vs Lee | 22–57 | 27.85% |
| Jammyyy vs Clive | 30–46 | 39.47% |
| Jammyyy vs Anna | 28–36 | 43.75% |
| Jammyyy vs Asuka | 17–42 | 28.81% |
| Jammyyy vs Alisa | 21–38 | 35.59% |
| Jammyyy vs Victor | 30–27 | 52.63% |
| Jammyyy vs Jack-8 | 19–29 | 39.58% |
| Jammyyy vs Armor King | 22–26 | 45.83% |
| Jammyyy vs Feng | 14–33 | 29.79% |
| Jammyyy vs Eddy | 9–34 | 20.93% |
| Jammyyy vs Lars | 16–19 | 45.71% |
| Jammyyy vs Lidia | 17–18 | 48.57% |
| Jammyyy vs Leroy | 11–17 | 39.29% |
| Jammyyy vs Leo | 8–16 | 33.33% |
| Jammyyy vs Raven | 10–9 | 52.63% |
| Jammyyy vs Claudio | 4–14 | 22.22% |
| Jammyyy vs Kuma | 4–13 | 23.53% |
| Jammyyy vs Fahkumram | 8–9 | 47.06% |
| Jammyyy vs Miary Zo | 8–4 | 66.67% |
| Jammyyy vs Zafina | 4–5 | 44.44% |
| Jammyyy vs Shaheen | 4–2 | 66.67% |
| Jammyyy vs Panda | 2–4 | 33.33% |
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.