| Jason Marci vs King | 5–5 | 50.00% |
| Jason Marci vs Law | 2–6 | 25.00% |
| Jason Marci vs Reina | 4–4 | 50.00% |
| Jason Marci vs Hwoarang | 1–6 | 14.29% |
| Jason Marci vs Jin | 2–5 | 28.57% |
| Jason Marci vs Eddy | 4–3 | 57.14% |
| Jason Marci vs Steve | 0–6 | 0.00% |
| Jason Marci vs Asuka | 5–1 | 83.33% |
| Jason Marci vs Lidia | 2–4 | 33.33% |
| Jason Marci vs Dragunov | 5–0 | 100.00% |
| Jason Marci vs Lili | 1–3 | 25.00% |
| Jason Marci vs Yoshimitsu | 1–2 | 33.33% |
| Jason Marci vs Xiaoyu | 2–1 | 66.67% |
| Jason Marci vs Nina | 1–2 | 33.33% |
| Jason Marci vs Victor | 1–2 | 33.33% |
| Jason Marci vs Bryan | 0–2 | 0.00% |
| Jason Marci vs Kazuya | 0–2 | 0.00% |
| Jason Marci vs Alisa | 0–2 | 0.00% |
| Jason Marci vs Lee | 1–1 | 50.00% |
| Jason Marci vs Kuma | 0–2 | 0.00% |
| Jason Marci vs Leroy | 1–1 | 50.00% |
| Jason Marci vs Azucena | 0–2 | 0.00% |
| Jason Marci vs Raven | 1–1 | 50.00% |
| Jason Marci vs Jack-8 | 0–1 | 0.00% |
| Jason Marci vs Feng | 0–1 | 0.00% |
| Jason Marci vs Claudio | 0–1 | 0.00% |
| Jason Marci vs Jun | 1–0 | 100.00% |
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.