See Key for column definitions.
| Team | Competition | Starts | Subs | Subbed | Total | Mins | MPG | Rating |
|---|
| UEFA U17 Championship - Qualification | 0 | 1 | 0 | 1 | 0 | 0.0 | |
| UEFA U17 Championship | 1 | 1 | 1 | 2 | 87 | 43.5 | |
| Poland U17 | UEFA U17 Championship | 1 | 1 | 1 | 2 | 87 | 43.5 | |
| Poland U17 | UEFA U17 Championship - Qualification | 0 | 1 | 0 | 1 | 0 | 0.0 | |
| Totals | | 2 | 4 | 2 | 6 | 174 | 29.0 | |
Key to column names
See Key for column definitions.
| Team | Competition | Appearances | Goals | GPG | MPG | Assists | Shots | On T | Off T | SPG | Dribbles | Passes | Acc | Fouled |
|---|
| UEFA U17 Championship - Qualification | 1 | 0 | | | 0 | 0 | 0 | 0 | N/A | 0 | | | 0 |
| UEFA U17 Championship | 2 | 0 | | | 0 | 0 | 0 | 0 | N/A | 0 | | | 0 |
| Poland U17 | UEFA U17 Championship | 2 | 0 | | | 0 | 0 | 0 | 0 | N/A | 0 | | | 0 |
| Poland U17 | UEFA U17 Championship - Qualification | 1 | 0 | | | 0 | 0 | 0 | 0 | N/A | 0 | | | 0 |
| Totals | | 6 | 0 | | | 0 | 0 | 0 | 0 | N/A | 0 | 0 | 0 | 0 |
Key to column names
- GPG
- Goals per game
- MPG
- Minutes per goal
- SPG
- Shots per goal
- On T
- Shots on Target
- Off T
- Shots off Target
- Acc
- Accurate passes
| Team |
Competition |
Appearances |
Conceded | Saves | Tackles | Blocks | Interceptions | Duels Won | Duels Lost | Fouls Committed |
| UEFA U17 Championship - Qualification | 1 | | | 0 | 0 | 0 | 0 | 0 | 0 |
| UEFA U17 Championship | 2 | | | 0 | 0 | 0 | 0 | 0 | 0 |
| Poland U17 | UEFA U17 Championship | 2 | | | 0 | 0 | 0 | 0 | 0 | 0 |
| Poland U17 | UEFA U17 Championship - Qualification | 1 | | | 0 | 0 | 0 | 0 | 0 | 0 |
| Totals | | 6 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The total yellow and red cards received by J. Leszczyński in each competition are shown below.
| Team | Competition | Appearances | Yellows | Reds |
|---|
| UEFA U17 Championship - Qualification | 1 | 0 | 0 |
| UEFA U17 Championship | 2 | 0 | 0 |
| Poland U17 | UEFA U17 Championship | 2 | 0 | 0 |
| Poland U17 | UEFA U17 Championship - Qualification | 1 | 0 | 0 |
| Totals | | 6 | 0 | 0 |
