| Season | League | Apps | Min | Goals | Assists | G+A / 90 | Rating |
|---|---|---|---|---|---|---|---|
| 2017 | Ykkösliiga | 1 | 1 | 0 | 0 | — | — |
| 2019 | Kakkonen | 14 | 923 | 1 | 0 | 0.1 | — |
| 2020 | Kakkonen | 12 | 270 | 1 | 0 | 0.33 | — |
| 2021 | Kakkonen | 15 | 348 | 1 | 0 | 0.26 | 0 |
| 2022 | Kakkonen | 22 | 1872 | 2 | 0 | 0.1 | — |
| 2023 | Kakkonen | 2 | 156 | 0 | 0 | 0 | — |
| 2024 | Kakkonen | 3 | 52 | 0 | 0 | — | — |
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.
Cohort: 125 Kakkonen midfielders, 2022, min. 450 minutes. Computed by ranking the full league corpus, not taken from any feed.
Figures computed from the GioScore season-stats database · as of 2026-07-10
Player stats against each opponent club
| Team | MP | W | D | L | G | A | ||
|---|---|---|---|---|---|---|---|---|
 VIFK | 3 | 0 | 1 | 2 | 0 | 0 | 0 | 0 |
 PS Kemi | 2 | 1 | 0 | 1 | 0 | 0 | 0 | 0 |
 JJK | 2 | 0 | 1 | 1 | 0 | 0 | 0 | 0 |
 SJK Akatemia | 2 | 0 | 0 | 2 | 0 | 0 | 0 | 0 |
 Vaajakoski | 2 | 1 | 0 | 1 | 0 | 0 | 0 | 0 |
 RoPS II | 2 | 1 | 0 | 1 | 0 | 0 | 0 | 0 |
 JäPS II | 2 | 2 | 0 | 0 | 0 | 0 | 0 | 0 |
 MuSa | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
 OPS | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 OLS | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
 P-Iirot | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 JIPPO | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
 GBK | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
 JBK | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 KuFu-98 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 PK-37 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 Futura | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
 KajHa | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 0 |
 VPS II | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 Ilves II | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
All of Onni Heikkinen's 2022 Kakkonen output came as goals: 2 goals in 22 games (1,872 minutes) — 0.1 goal involvements per 90. Ranked across the 125 Kakkonen midfielders who played 450+ minutes in 2022, he comes out in the 58th percentile by goal involvements per 90, and 22nd of 125 for goals scored.
His league record spans 7 seasons (2017–2025) across 3 clubs.
| Club | Period | Apps | Goals | Assists | Minutes | YC | RC | Rating |
|---|---|---|---|---|---|---|---|---|
| JS Hercules | 2019/2020 - 2023/2024 | 65 | 5 | 0 | 3569 | — | — | — |
| PPJ | 2023/2024 - now | 11 | 1 | 0 | 90 | — | — | — |
| Total | 76 | 6 | 0 | 3659 |
| Season | Club | Apps | Goals | Assists | Minutes | YC | RC | Rating |
|---|---|---|---|---|---|---|---|---|
| 24/25 | PPJ | 8 | 1 | — | — | 2 | 0 | — |
| 23/24 | PPJ | 3 | 0 | — | 90 | 0 | 0 | — |
| 21/22 | JS Hercules | 22 | 2 | — | 1872 | 3 | 0 | — |
| 20/21 | JS Hercules | 15 | 1 | — | 348 | 1 | 0 | — |
| 19/20 | JS Hercules | 12 | 1 | — | 270 | 1 | 0 | — |
| 18/19 | JS Hercules | 14 | 1 | — | 923 | 0 | 0 | — |
