| Season | League | Apps | Min | Goals | Assists | G+A / 90 | Rating |
|---|---|---|---|---|---|---|---|
| — | Premier League (Armenia) | 2 | 180 | 0 | 1 | 0.5 | 6.5 |
| 2015/2016 | Superliga (Romania) | 4 | 94 | 1 | 0 | 0.96 | — |
| 2016/2017 | Liga 2: Serie 1 (Romania) | 22 | 1125 | 6 | 0 | 0.48 | — |
| 2017/2018 | Superliga (Romania) | 27 | 994 | 3 | 2 | 0.45 | — |
| 2018/2019 | Superliga (Romania) | 18 | 578 | 1 | 1 | 0.31 | — |
| 2019/2020 | Superliga (Romania) | 34 | 2397 | 4 | 4 | 0.3 | — |
| 2020/2021 | Superliga (Romania) | 35 | 2134 | 4 | 2 | 0.25 | — |
| 2021/2022 | Superliga (Romania) | 21 | 859 | 3 | 2 | 0.52 | — |
| 2022/2023 | Superliga (Romania) | 24 | 1245 | 0 | 3 | 0.22 | 6.12 |
| 2023/2024 | Superliga (Romania) | 3 | 88 | 0 | 2 | — | 7.01 |
| 2023/2024 | 1. Division | 29 | 1434 | 3 | 1 | 0.25 | 9.08 |
| 2024/2025 | Superliga (Romania) | 38 | 2734 | 6 | 5 | 0.36 | 7.05 |
| 2025/2026 | Superliga (Romania) | 27 | 2147 | 9 | 4 | 0.54 | 6.96 |
| 2025/2026 | Premier League (Armenia) | 5 | 381 | 1 | 2 | 0.71 | 7.46 |
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 2026-08-17
Valentin Costache's 2025/2026 Superliga (Romania) season produced 9 goals and 4 assists across 27 appearances (2,147 minutes) — 0.54 goal involvements per 90. GioScore's computed rating for the season averages 6.96.
2023/2024 stands as his highest-rated season (9.08, 1. Division), with 2022/2023 the weakest (6.12). The direction of late is downward — 0.21 under his prior average over the last two rated seasons.
