| MammasBoy vs Steve | 5–8 | 38.46% |
| MammasBoy vs King | 1–6 | 14.29% |
| MammasBoy vs Claudio | 3–4 | 42.86% |
| MammasBoy vs Eddy | 2–5 | 28.57% |
| MammasBoy vs Jin | 3–3 | 50.00% |
| MammasBoy vs Dragunov | 3–2 | 60.00% |
| MammasBoy vs Zafina | 2–3 | 40.00% |
| MammasBoy vs Fahkumram | 3–2 | 60.00% |
| MammasBoy vs Jack-8 | 0–4 | 0.00% |
| MammasBoy vs Lili | 3–1 | 75.00% |
| MammasBoy vs Leo | 2–2 | 50.00% |
| MammasBoy vs Lars | 2–2 | 50.00% |
| MammasBoy vs Law | 2–1 | 66.67% |
| MammasBoy vs Hwoarang | 0–3 | 0.00% |
| MammasBoy vs Reina | 0–3 | 0.00% |
| MammasBoy vs Clive | 0–3 | 0.00% |
| MammasBoy vs Armor King | 2–1 | 66.67% |
| MammasBoy vs Miary Zo | 0–3 | 0.00% |
| MammasBoy vs Yoshimitsu | 0–2 | 0.00% |
| MammasBoy vs Kazuya | 0–2 | 0.00% |
| MammasBoy vs Jun | 2–0 | 100.00% |
| MammasBoy vs Xiaoyu | 0–1 | 0.00% |
| MammasBoy vs Bryan | 0–1 | 0.00% |
| MammasBoy vs Asuka | 1–0 | 100.00% |
| MammasBoy vs Azucena | 1–0 | 100.00% |
| MammasBoy vs Lidia | 1–0 | 100.00% |
| MammasBoy vs Heihachi | 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.