See Key for column definitions.
| Team | Competition | Starts | Subs | Subbed | Total | Mins | MPG | Rating |
| Olimpia | CONMEBOL Sudamericana | 5 | 1 | 1 | 6 | 482 | 80.3 | 6.98 |
| Olimpia | Division Profesional - Clausura | 14 | 5 | 7 | 19 | 1,173 | 61.7 | 6.86 |
| Totals | | 19 | 6 | 8 | 25 | 1,655 | 66.2 | 6.89 |
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 | 6 | 1 | 6.0 | 482 | 0 | 9 | 6 | 3 | 9 | 6 | 323 | 88 | 2 |
| Olimpia | Division Profesional - Clausura | 19 | 0 | | | 0 | 9 | 2 | 7 | N/A | 18 | 632 | 85 | 13 |
| Totals | | 25 | 1 | | | 0 | 18 | 8 | 10 | 18 | 24 | 955 | 173 | 15 |
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 | 6 | 0 | | 7 | 1 | 6 | 27 | 33 | 10 |
| Olimpia | Division Profesional - Clausura | 19 | 0 | | 31 | 7 | 20 | 80 | 70 | 19 |
| Totals | | 25 | 0 | 0 | 38 | 8 | 26 | 107 | 103 | 29 |
The total yellow and red cards received by J. Alfaro in each competition are shown below.
| Team | Competition | Appearances | Yellows | Reds |
| Olimpia | CONMEBOL Sudamericana | 6 | 1 | 0 |
| Olimpia | Division Profesional - Clausura | 19 | 3 | 0 |
| Totals | | 25 | 4 | 0 |