See Key for column definitions.
| Team | Competition | Starts | Subs | Subbed | Total | Mins | MPG | Rating |
| N.E.C. | KNVB Beker | 0 | 1 | 2 | 3 | 150 | 50.0 | 6.83 |
| N.E.C. | Dutch Eredivisie | 0 | 4 | 2 | 6 | 177 | 29.5 | 6.60 |
| Totals | | 0 | 5 | 4 | 9 | 327 | 36.3 | 6.68 |
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 |
| N.E.C. | KNVB Beker | 3 | 0 | | | 0 | 1 | 0 | 1 | N/A | 3 | 140 | 62 | 2 |
| N.E.C. | Dutch Eredivisie | 6 | 0 | | | 0 | 0 | 0 | 0 | N/A | 3 | 71 | 85 | 2 |
| Totals | | 9 | 0 | | | 0 | 1 | 0 | 1 | N/A | 6 | 211 | 147 | 4 |
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 |
| N.E.C. | KNVB Beker | 3 | 0 | | 1 | 1 | 1 | 4 | 5 | 2 |
| N.E.C. | Dutch Eredivisie | 6 | 0 | | 3 | 1 | 2 | 8 | 6 | 1 |
| Totals | | 9 | 0 | 0 | 4 | 2 | 3 | 12 | 11 | 3 |
The total yellow and red cards received by J. Willems in each competition are shown below.