| Season | League | Apps | Min | Goals | Assists | G+A / 90 | Rating |
|---|---|---|---|---|---|---|---|
| 2018 | Ykkösliiga | 3 | 122 | 0 | 0 | 0 | — |
| 2018 | Kakkonen | 3 | 122 | 0 | 0 | 0 | — |
| 2019 | Ykkösliiga | 3 | 122 | 0 | 0 | 0 | — |
| 2019 | Kakkonen | 14 | 1051 | 0 | 0 | 0 | — |
| 2020 | Kakkonen | 16 | 1292 | 9 | 0 | 0.63 | — |
| 2021 | Ykkösliiga | 23 | 2017 | 2 | 0 | 0.09 | — |
| 2022 | Veikkausliiga | 10 | 179 | 0 | 1 | 0.5 | — |
| 2022 | Kakkonen | 5 | 426 | 1 | 0 | 0.21 | — |
| 2024 | Veikkausliiga | 29 | 2500 | 5 | 3 | 0.29 | 6.71 |
| 2025 | Veikkausliiga | 28 | 2143 | 2 | 9 | 0.46 | 6.92 |
| 2026 | Veikkausliiga | 15 | 720 | 0 | 3 | 0.38 | 6.97 |
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
Player stats against each opponent club
| Team | MP | W | D | L | G | A | ||
|---|---|---|---|---|---|---|---|---|
 Inter Turku | 6 | 0 | 2 | 4 | 2 | 0 | 0 | 0 |
 Ilves | 6 | 1 | 2 | 3 | 2 | 1 | 1 | 0 |
 Oulu | 6 | 4 | 1 | 1 | 0 | 1 | 2 | 0 |
 SJK | 5 | 1 | 1 | 3 | 1 | 1 | 0 | 0 |
 VPS | 5 | 1 | 2 | 2 | 0 | 0 | 1 | 0 |
 EIF | 5 | 2 | 0 | 3 | 1 | 0 | 0 | 0 |
 Haka | 5 | 2 | 0 | 3 | 0 | 0 | 1 | 0 |
 HJK | 4 | 2 | 0 | 2 | 0 | 0 | 0 | 0 |
 Mariehamn | 4 | 3 | 1 | 0 | 1 | 2 | 0 | 0 |
 KuPS | 4 | 0 | 1 | 3 | 0 | 0 | 0 | 0 |
 Jaro | 4 | 0 | 2 | 2 | 0 | 0 | 0 | 0 |
 Lahti | 2 | 0 | 2 | 0 | 0 | 1 | 0 | 0 |
 KTP | 2 | 1 | 1 | 0 | 0 | 1 | 1 | 0 |
 MP | 2 | 1 | 0 | 1 | 0 | 0 | 1 | 0 |
 VJS | 2 | 0 | 1 | 1 | 0 | 0 | 0 | 0 |
 Kajaani | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 Viikingit | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 KPV | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
 JJK | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
 Klubi-04 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
Player stats against each opponent national team
| Team | MP | W | D | L | G | A | ||
|---|---|---|---|---|---|---|---|---|
 Iceland U17 | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
 Faroe Islands U17 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 Slovakia U17 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 Switzerland U17 | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
 Portugal U17 | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
Every direct contribution from S. Heiskanen in the 2026 Veikkausliiga was an assist — 3 assists across 15 games (720 minutes) — 0.38 goal involvements per 90. That season graded out at an average match rating of 6.97.
His current 2026 rating of 6.97 tops his recorded career; 2024 (6.71) marks the low.
