| Temporada | Equipo | Competición | PJ | G | A | Nota | ||
|---|---|---|---|---|---|---|---|---|
| 2026 | Austin FC | MLS | 10 | 0 | 1 | 1 | 0 | 6.4 |
| 2025 | Austin FC | MLS | 36 | 2 | 0 | 2 | 0 | 6.8 |
| 2024 | Austin FC | MLS | 29 | 3 | 2 | 3 | 0 | 6.9 |
| 2023 | Austin FC | MLS | 34 | 5 | 4 | 4 | 0 | 6.8 |
| 2022 | Austin FC | MLS | 30 | 1 | 3 | 1 | 0 | 6.7 |
| 2021 | Austin FC | MLS | 26 | 3 | 1 | 1 | 0 | 6.7 |
| 2020 | Atlanta Utd | MLS | 16 | 4 | 0 | 0 | 0 | 6.9 |
| 2020 | Atlanta Utd | MLS is Back | 16 | 4 | 0 | 0 | 0 | 6.9 |
| 2019/2020 | Aberdeen | Premiership | 15 | 1 | 0 | 0 | 0 | 6.5 |
| 2019 | Atlanta United 2 | USL Championship | 8 | 1 | 1 | 1 | 0 | – |
| 2018 | Atlanta United 2 | USL | 30 | 6 | 0 | 2 | 0 | – |
| Total | 250 | 30 | 12 | 15 | 0 | – | ||
| Date | From | To | Type | |
|---|---|---|---|---|
| - | Atlanta Utd | Austin FC | Transfer | |
| - | Aberdeen | Atlanta Utd | Return from loan | |
| 07 Jan 2019 | Atlanta Utd | Aberdeen | Loan |
J. Gallagher career history shows progression across clubs and competitions, including club timeline, national team appearances and overall career totals.