| Season | League | Apps | Min | Goals | Assists | G+A / 90 | Rating |
|---|---|---|---|---|---|---|---|
| 2023 | Premier Division | 2 | — | 0 | 0 | — | — |
| 2024 | First Division (Ireland) | 24 | 1986 | 4 | 0 | 0.18 | — |
| 2025 | Premier Division | 14 | 929 | 0 | 2 | 0.19 | 6.91 |
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 2026-07-23
Player stats against each opponent club
| Team | MP | W | D | L | G | A | ||
|---|---|---|---|---|---|---|---|---|
 Shamrock Rovers | 3 | 1 | 1 | 1 | 0 | 0 | 0 | 0 |
 Finn Harps | 3 | 2 | 1 | 0 | 1 | 0 | 0 | 0 |
 Derry City | 3 | 0 | 0 | 3 | 0 | 0 | 0 | 0 |
 Bray Wanderers | 3 | 2 | 1 | 0 | 1 | 0 | 0 | 0 |
 Galway United | 2 | 0 | 1 | 1 | 0 | 0 | 1 | 0 |
 Bohemians | 2 | 0 | 0 | 2 | 0 | 0 | 1 | 0 |
 St Patrick's | 2 | 0 | 0 | 2 | 0 | 0 | 0 | 0 |
 Longford Town | 2 | 2 | 0 | 0 | 0 | 0 | 0 | 0 |
 Waterford United | 2 | 1 | 0 | 1 | 0 | 0 | 1 | 0 |
 Wexford Youths | 2 | 1 | 1 | 0 | 2 | 0 | 0 | 0 |
 Treaty United | 2 | 0 | 2 | 0 | 0 | 0 | 0 | 0 |
 Kerry | 2 | 2 | 0 | 0 | 0 | 0 | 0 | 0 |
 Shelbourne | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
 Cobh Ramblers | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 Drogheda United | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
 UCD | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 Athlone Town | 1 | 0 | 1 | 0 | 0 | 0 | 1 | 0 |
Every direct contribution from Cathal O'Sullivan in the 2025 Premier Division was an assist — 2 assists across 14 games (929 minutes) — 0.19 goal involvements per 90. His average match rating for that season computes to 6.91.
3 league seasons sit on his record, from 2023 to 2025, all with a single club.
