See Key for column definitions.
| Team | Competition | Starts | Subs | Subbed | Total | Mins | MPG | Rating |
| Olimpia | CONMEBOL Sudamericana | 7 | 1 | 2 | 8 | 652 | 81.5 | 6.96 |
| Olimpia | Division Profesional - Clausura | 11 | 1 | 9 | 12 | 821 | 68.4 | 6.65 |
| Totals | | 18 | 2 | 11 | 20 | 1,473 | 73.7 | 6.77 |
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 |
| Olimpia | CONMEBOL Sudamericana | 8 | 1 | 8.0 | 652 | 0 | 11 | 6 | 5 | 11 | 7 | 422 | 88 | 6 |
| Olimpia | Division Profesional - Clausura | 12 | 0 | | | 0 | 11 | 3 | 8 | N/A | 9 | 484 | 85 | 1 |
| Totals | | 20 | 1 | | | 0 | 22 | 9 | 13 | 22 | 16 | 906 | 173 | 7 |
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 |
| Olimpia | CONMEBOL Sudamericana | 8 | 0 | | 10 | 1 | 10 | 39 | 43 | 15 |
| Olimpia | Division Profesional - Clausura | 12 | 0 | 0 | 25 | 1 | 12 | 45 | 37 | 10 |
| Totals | | 20 | 0 | 0 | 35 | 2 | 22 | 84 | 80 | 25 |
The total yellow and red cards received by J. Alfaro in each competition are shown below.
| Team | Competition | Appearances | Yellows | Reds |
| Olimpia | CONMEBOL Sudamericana | 8 | 1 | 0 |
| Olimpia | Division Profesional - Clausura | 12 | 4 | 0 |
| Totals | | 20 | 5 | 0 |