| Season | League | Apps | Min | Goals | Assists | G+A / 90 | Rating |
|---|---|---|---|---|---|---|---|
| 2019 | Kakkonen | 1 | 90 | 0 | 0 | 0 | — |
| 2020 | Ykkösliiga | 11 | 771 | 0 | 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: 40 Ykkösliiga defenders, 2020, 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 2026-09-02
2020 brought Onni Heinonen 11 appearances in the Ykkösliiga (771 minutes), with no direct goal involvement recorded. Measured against a cohort of 40 Ykkösliiga defenders with a minimum of 450 minutes in 2020, he ranks in the 60th percentile by goal involvements per 90 — above the cohort median; for goals scored he stands 17th of 40.
The record shows 2 league seasons for him (2019–2020), all with a single club.
