| Season | League | Apps | Min | Goals | Assists | G+A / 90 | Rating |
|---|---|---|---|---|---|---|---|
| 2017 | Premier Division | 1 | 29 | 0 | 0 | — | — |
| 2018 | Premier Division | 12 | 677 | 0 | 0 | 0 | — |
| 2019 | First Division (Ireland) | 11 | 339 | 2 | 0 | 0.53 | — |
| 2022 | Premier Division | 9 | 633 | 1 | 3 | 0.57 | 0 |
| 2023 | Premier Division | 2 | 103 | 0 | 0 | 0 | 6 |
| 2024 | Premier Division | 30 | 367 | 0 | 3 | 0.74 | — |
| 2025 | First Division (Ireland) | 15 | 1267 | 1 | 3 | 0.28 | 6.67 |
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 2026-07-30
Player stats against each opponent club
| Team | MP | W | D | L | G | A | ||
|---|---|---|---|---|---|---|---|---|
 Shamrock Rovers | 8 | 1 | 2 | 5 | 0 | 0 | 1 | 0 |
 St Patrick's | 7 | 1 | 2 | 4 | 0 | 0 | 0 | 0 |
 Drogheda United | 6 | 1 | 3 | 2 | 0 | 1 | 1 | 0 |
 Longford Town | 5 | 2 | 1 | 2 | 0 | 0 | 0 | 0 |
 Dundalk | 5 | 2 | 2 | 1 | 0 | 2 | 1 | 0 |
 Bohemians | 4 | 0 | 1 | 3 | 0 | 0 | 1 | 0 |
 Shelbourne | 4 | 1 | 0 | 3 | 0 | 0 | 0 | 0 |
 Bray Wanderers | 4 | 1 | 0 | 3 | 0 | 0 | 1 | 0 |
 Waterford United | 4 | 3 | 0 | 1 | 0 | 0 | 0 | 0 |
 Wexford Youths | 4 | 2 | 0 | 2 | 1 | 0 | 0 | 0 |
 Cobh Ramblers | 3 | 1 | 0 | 2 | 1 | 0 | 0 | 0 |
 Sligo Rovers | 3 | 0 | 2 | 1 | 1 | 0 | 0 | 0 |
 Derry City | 3 | 1 | 0 | 2 | 0 | 0 | 1 | 0 |
 UCD | 3 | 2 | 1 | 0 | 1 | 0 | 0 | 0 |
 Athlone Town | 3 | 2 | 1 | 0 | 0 | 1 | 1 | 0 |
 Kerry | 2 | 1 | 1 | 0 | 0 | 0 | 0 | 0 |
 Galway United | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
 Finn Harps | 1 | 1 | 0 | 0 | 1 | 1 | 0 | 0 |
 Green Gully | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 0 |
Karl O'Sullivan's 2025 First Division (Ireland) season produced 1 goal and 3 assists across 15 appearances (1,267 minutes) — 0.28 goal involvements per 90. GioScore's computed rating for the season averages 6.67.
His recorded league career runs from 2017 to 2025: 7 seasons across 5 clubs. 2025's 6.67 stands as his career-best rating, with 2022 (0) at the other end.
