| Season | League | Apps | Min | Goals | Assists | G+A / 90 | Rating |
|---|---|---|---|---|---|---|---|
| — | Challenge League | 2 | 39 | 0 | 0 | — | 6.77 |
| 2012/2013 | Challenge League | 17 | 460 | 0 | 0 | 0 | — |
| 2014/2015 | Challenge League | 27 | 2340 | 10 | 0 | 0.38 | — |
| 2015/2016 | Super League (Switzerland) | 31 | 2163 | 9 | 0 | 0.37 | — |
| 2016/2017 | Super League (Switzerland) | 29 | 2034 | 5 | 0 | 0.22 | — |
| 2017/2018 | Super League (Switzerland) | 32 | 2189 | 8 | 4 | 0.49 | — |
| 2018/2019 | Challenge League | 14 | 953 | 2 | 1 | 0.28 | — |
| 2018/2019 | Super League (Switzerland) | 15 | 634 | 1 | 3 | 0.57 | — |
| 2019/2020 | Challenge League | 34 | 2799 | 12 | 5 | 0.55 | — |
| 2020/2021 | Challenge League | 33 | 2824 | 11 | 8 | 0.61 | — |
| 2021/2022 | Challenge League | 26 | 1970 | 16 | 2 | 0.82 | — |
| 2022/2023 | Super League (Switzerland) | 34 | 2085 | 6 | 3 | 0.39 | 6.8 |
| 2023/2024 | Super League (Switzerland) | 13 | 371 | 2 | 0 | 0.49 | 6.73 |
| 2024/2025 | Super League (Switzerland) | 15 | 167 | 2 | 1 | 1.62 | 6.77 |
| 2025/2026 | Super League (Switzerland) | 24 | 919 | 3 | 1 | 0.39 | 6.68 |
Domestic league competitions only (SportMonks sub_type='domestic'); national-team, continental and cup competitions are excluded. Classification resolved by league id against the canonical leagues index. G+A/90 computed from minutes actually played.
Figures computed from the GioScore season-stats database · as of 2026-08-14
Player stats against each opponent club
| Team | MP | W | D | L | G | A | ||
|---|---|---|---|---|---|---|---|---|
 Sion | 7 | 4 | 1 | 2 | 2 | 1 | 1 | 0 |
 Grasshopper | 7 | 4 | 1 | 2 | 0 | 0 | 0 | 0 |
 St. Gallen | 6 | 3 | 0 | 3 | 0 | 1 | 1 | 0 |
 Zürich | 6 | 0 | 2 | 4 | 1 | 0 | 0 | 0 |
 Servette | 6 | 1 | 2 | 3 | 1 | 0 | 1 | 0 |
 Thun | 6 | 2 | 1 | 3 | 2 | 1 | 2 | 0 |
 Vaduz | 6 | 0 | 4 | 2 | 2 | 0 | 2 | 0 |
 Lugano | 6 | 1 | 1 | 4 | 0 | 0 | 0 | 0 |
 Basel | 4 | 0 | 0 | 4 | 0 | 0 | 0 | 0 |
 Aarau | 4 | 1 | 1 | 2 | 0 | 0 | 0 | 0 |
 Young Boys | 3 | 1 | 0 | 2 | 1 | 0 | 1 | 0 |
 Wohlen | 3 | 1 | 1 | 1 | 0 | 0 | 1 | 0 |
 Lausanne Sport | 3 | 2 | 0 | 1 | 0 | 0 | 0 | 0 |
 Wil | 3 | 1 | 1 | 1 | 1 | 0 | 0 | 0 |
 Luzern | 3 | 1 | 0 | 2 | 1 | 0 | 1 | 0 |
 Chiasso | 3 | 1 | 0 | 2 | 1 | 0 | 0 | 0 |
 FC Schaffhausen | 3 | 0 | 1 | 2 | 2 | 0 | 1 | 0 |
 Yverdon Sport | 3 | 0 | 2 | 1 | 0 | 0 | 1 | 0 |
 Neuchâtel Xamax | 2 | 1 | 0 | 1 | 1 | 0 | 0 | 0 |
 Hapoel Be'er Sheva | 2 | 1 | 1 | 0 | 0 | 0 | 0 | 0 |
Roman Buess's 2025/2026 Super League (Switzerland) season produced 3 goals and 1 assist across 24 appearances (919 minutes) — 0.39 goal involvements per 90. Per-match rating over the season: 6.68.
Season ratings peak at 6.8 in 2022/2023, Super League (Switzerland) and bottom out at 6.68 in 2025/2026.
