| Season | League | Apps | Min | Goals | Assists | G+A / 90 | Rating |
|---|---|---|---|---|---|---|---|
| 2016/2017 | Serie A | 8 | 278 | 0 | 0 | 0 | 6.61 |
| 2018/2019 | Serie A | 1 | 61 | 0 | 0 | — | 6.94 |
| 2018/2019 | Serie C: Girone A | 29 | 1771 | 3 | 0 | 0.15 | — |
| 2019/2020 | Serie B | 26 | 1567 | 0 | 2 | 0.11 | 7.11 |
| 2020/2021 | Serie B | 34 | 2399 | 2 | 1 | 0.11 | 7.09 |
| 2021/2022 | Serie A | 27 | 1343 | 1 | 1 | 0.13 | 6.92 |
| 2022/2023 | Serie A | 28 | 1277 | 2 | 1 | 0.21 | 6.91 |
| 2023/2024 | Serie A | 26 | 1487 | 3 | 3 | 0.36 | 7.02 |
| 2024/2025 | Serie A | 27 | 861 | 1 | 1 | 0.21 | 6.79 |
| 2025/2026 | Serie A | 6 | 48 | 0 | 0 | — | 6.5 |
| 2025/2026 | 1. Division | 15 | 1191 | 3 | 0 | 0.23 | 6.89 |
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 2026-07-24
Player stats against each opponent club
| Team | MP | W | D | L | G | A | ||
|---|---|---|---|---|---|---|---|---|
 Empoli | 13 | 2 | 4 | 7 | 1 | 0 | 2 | 0 |
 Roma | 11 | 1 | 2 | 8 | 1 | 0 | 3 | 0 |
 Udinese | 11 | 4 | 4 | 3 | 1 | 0 | 3 | 0 |
 Inter | 11 | 0 | 2 | 9 | 0 | 0 | 1 | 0 |
 Lazio | 10 | 3 | 0 | 7 | 1 | 2 | 0 | 0 |
 AC Milan | 10 | 0 | 5 | 5 | 0 | 1 | 1 | 0 |
 Atalanta | 10 | 2 | 2 | 6 | 0 | 0 | 0 | 0 |
 Fiorentina | 9 | 3 | 1 | 5 | 0 | 0 | 1 | 0 |
 Torino | 9 | 0 | 4 | 5 | 1 | 0 | 1 | 0 |
 Juventus | 9 | 0 | 3 | 6 | 0 | 0 | 0 | 0 |
 Genoa | 8 | 3 | 2 | 3 | 0 | 0 | 0 | 0 |
 Venezia | 8 | 4 | 3 | 1 | 0 | 0 | 1 | 0 |
 Lecce | 8 | 1 | 3 | 4 | 0 | 0 | 2 | 0 |
 Bologna | 8 | 1 | 3 | 4 | 0 | 0 | 1 | 0 |
 Cremonese | 8 | 1 | 4 | 3 | 0 | 1 | 2 | 0 |
 Cagliari | 7 | 1 | 2 | 4 | 1 | 0 | 3 | 0 |
 Napoli | 7 | 1 | 2 | 4 | 0 | 0 | 0 | 1 |
 Monza | 7 | 2 | 0 | 5 | 1 | 0 | 2 | 0 |
 Sassuolo | 7 | 1 | 2 | 4 | 0 | 0 | 0 | 0 |
 Sampdoria | 6 | 3 | 1 | 2 | 0 | 0 | 0 | 0 |
Player stats against each opponent national team
| Team | MP | W | D | L | G | A | ||
|---|---|---|---|---|---|---|---|---|
 San Marino | 4 | 4 | 0 | 0 | 3 | 0 | 0 | 0 |
 Greece | 3 | 1 | 0 | 2 | 0 | 1 | 0 | 0 |
 Bosnia and Herzegovina | 3 | 0 | 1 | 2 | 0 | 0 | 0 | 0 |
 Lithuania | 3 | 3 | 0 | 0 | 1 | 0 | 1 | 0 |
 Kosovo | 3 | 0 | 0 | 3 | 0 | 0 | 0 | 0 |
 Azerbaijan | 2 | 0 | 1 | 1 | 0 | 0 | 0 | 0 |
 Ukraine | 2 | 0 | 0 | 2 | 0 | 0 | 0 | 0 |
 Slovenia | 2 | 1 | 0 | 1 | 0 | 1 | 1 | 0 |
 Romania | 2 | 0 | 0 | 2 | 0 | 0 | 2 | 0 |
 Slovakia | 2 | 0 | 1 | 1 | 0 | 0 | 0 | 0 |
 Israel | 2 | 2 | 0 | 0 | 0 | 0 | 0 | 0 |
 Bulgaria | 2 | 0 | 1 | 1 | 0 | 0 | 0 | 0 |
 Georgia | 2 | 0 | 0 | 2 | 0 | 0 | 0 | 0 |
 Estonia | 2 | 0 | 1 | 1 | 0 | 0 | 0 | 0 |
 Moldova | 2 | 1 | 0 | 1 | 1 | 1 | 0 | 0 |
 Norway | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
 Croatia | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
 Belarus | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
 Armenia | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
 Austria | 1 | 0 | 0 | 1 | 0 | 0 | 1 | 0 |
Across 15 1. Division appearances in 2025/2026 (1,191 minutes), Grigoris Kastanos scored 3 goals but did not register an assist — 0.23 goal involvements per 90. Per-match rating over the season: 6.89.
At his best he averaged 7.11 in 2019/2020, Serie B; at his worst, 6.5 in 2025/2026. Compared with his earlier career average, the last two rated seasons are down by 0.23.
