J. Szumski transfers
| Date | Type | From | To |
|---|---|---|---|
| 2026-07-07 | Free agent | Sakaryaspor | Iğdır FK |
| 2026-06-29 | Free agent | Sakaryaspor | Iğdır FK |
| 2024-07-04 | N/A | Samsunspor | Sakaryaspor |
| 2022-06-30 | N/A | Erzurumspor FK | Samsunspor |
| 2018-01-26 | Free | Legia Warszawa | Raków Częstochowa |
| 2017-07-01 | N/A | Zaglebie Sosnowiec | Legia Warszawa |
| 2016-07-01 | Loan | Legia Warszawa | Zaglebie Sosnowiec |
| 2015-09-15 | Free | Piast Gliwice | Legia Warszawa |
| 2012-08-16 | N/A | Legia Warszawa | Piast Gliwice |