| Season | League | Apps | Min | Goals | Assists | G+A / 90 | Rating |
|---|---|---|---|---|---|---|---|
| — | Admiral Bundesliga | 2 | 180 | 0 | 0 | 0 | 6.77 |
| 2019/2020 | 3. Liga | 19 | 1006 | 2 | 2 | 0.36 | — |
| 2020/2021 | 3. Liga | 7 | 148 | 0 | 0 | 0 | — |
| 2021/2022 | Premier League (Russia) | 2 | 166 | 0 | 0 | 0 | 6.63 |
| 2021/2022 | Admiral Bundesliga | 17 | 1370 | 0 | 6 | 0.39 | 7.28 |
| 2022/2023 | Premier League (Russia) | 11 | 305 | 0 | 0 | 0 | 6.86 |
| 2023/2024 | Premier League (Russia) | 5 | 175 | 0 | 1 | 0.51 | 6.81 |
| 2024/2025 | Superliga (Denmark) | 22 | 1663 | 1 | 3 | 0.22 | 7.25 |
| 2025/2026 | 2. Bundesliga | 5 | 215 | 0 | 0 | 0 | 6.61 |
| 2025/2026 | Admiral Bundesliga | 15 | 1325 | 1 | 1 | 0.14 | 7.02 |
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 2026-08-15
In the 2025/2026 Admiral Bundesliga, Leon Klassen made 15 appearances (1,325 minutes), with 1 goal and 1 assist — 0.14 goal involvements per 90. GioScore's computed rating for the season averages 7.02.
No season rated higher than 2021/2022 (7.28, Admiral Bundesliga); none lower than 2025/2026 (6.61). His two latest rated seasons run 0.24 lower than the rest of his career.
