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 |
Onni Heikkinen plays as a midfielder for PPJ. Onni Heikkinen has scored 6 goals in 76 professional appearances across 2 clubs. Among the clubs he has represented — PPJ, JS Hercules — Onni Heikkinen was most prolific at JS Hercules, where he scored 5 goals in 65 appearances. Onni Heikkinen stands 184 cm tall.
