| Season | Team | Competition | MP | G | A | Rating | ||
|---|---|---|---|---|---|---|---|---|
| 2026 | Monterey Bay | USL Championship | 3 | 0 | 0 | 0 | 0 | – |
| 2025 | Monterey Bay | USL Championship | 12 | 1 | 1 | 1 | 0 | – |
| 2025 | Charleston | USL Championship | 11 | 1 | 0 | 0 | 0 | – |
| 2024 | St. Louis City | MLS | 7 | 0 | 1 | 0 | 0 | 6.6 |
| 2024 | St. Louis City 2 | MLS Next Pro | 22 | 6 | 7 | 2 | 0 | – |
| 2023 | St. Louis City | MLS | 2 | 0 | 0 | 0 | 0 | 6.5 |
| 2023 | St. Louis City 2 | MLS Next Pro | 29 | 13 | 4 | 3 | 0 | – |
| Total | 86 | 21 | 13 | 6 | 0 | – | ||
| Fecha | Desde | Hacia | Tipo | |
|---|---|---|---|---|
| 08 may 2025 | Charleston | Monterey Bay | Transfer | |
| 01 oct 2025 | St. Louis City | Charleston | Free agent | |
| - | Saint Louis Billikens | St. Louis City | Transfer | |
| 12 ene 2018 | Portland Timbers | Saint Louis Billikens | Free agent |
J. Klein career history shows progression across clubs and competitions, including club timeline, national team appearances and overall career totals.