| Brian Siegal vs Yoshimitsu | 42–29 | 59.15% |
| Brian Siegal vs Jin | 31–34 | 47.69% |
| Brian Siegal vs Steve | 27–26 | 50.94% |
| Brian Siegal vs Kazuya | 37–15 | 71.15% |
| Brian Siegal vs Bryan | 29–21 | 58.00% |
| Brian Siegal vs Law | 28–21 | 57.14% |
| Brian Siegal vs Reina | 25–24 | 51.02% |
| Brian Siegal vs King | 30–16 | 65.22% |
| Brian Siegal vs Lili | 31–14 | 68.89% |
| Brian Siegal vs Dragunov | 17–28 | 37.78% |
| Brian Siegal vs Xiaoyu | 21–19 | 52.50% |
| Brian Siegal vs Victor | 20–19 | 51.28% |
| Brian Siegal vs Nina | 14–23 | 37.84% |
| Brian Siegal vs Hwoarang | 15–19 | 44.12% |
| Brian Siegal vs Jack-8 | 18–16 | 52.94% |
| Brian Siegal vs Alisa | 14–20 | 41.18% |
| Brian Siegal vs Lars | 13–19 | 40.62% |
| Brian Siegal vs Jun | 15–16 | 48.39% |
| Brian Siegal vs Paul | 10–18 | 35.71% |
| Brian Siegal vs Devil Jin | 15–9 | 62.50% |
| Brian Siegal vs Feng | 11–13 | 45.83% |
| Brian Siegal vs Claudio | 18–5 | 78.26% |
| Brian Siegal vs Lee | 12–9 | 57.14% |
| Brian Siegal vs Azucena | 14–6 | 70.00% |
| Brian Siegal vs Asuka | 11–7 | 61.11% |
| Brian Siegal vs Zafina | 7–11 | 38.89% |
| Brian Siegal vs Leroy | 9–9 | 50.00% |
| Brian Siegal vs Eddy | 9–7 | 56.25% |
| Brian Siegal vs Leo | 9–6 | 60.00% |
| Brian Siegal vs Raven | 7–8 | 46.67% |
| Brian Siegal vs Shaheen | 6–7 | 46.15% |
| Brian Siegal vs Kuma | 1–3 | 25.00% |
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.