Not enough days in 2013 season to compile WAA record.
| Date | Rank | WAA | TeamID |
|---|---|---|---|
| 20130411 | XXXXX | 0.08 | OAK |
| 20130425 | XXXXX | 0.31 | OAK |
| 20130509 | XXXXX | 0.57 | OAK |
| 20130523 | XXXXX | 1.06 | OAK |
| 20130606 | +088+ | 1.49 | OAK |
| 20130620 | +070+ | 1.84 | OAK |
| 20130704 | +105+ | 1.62 | OAK |
| 20130722 | +086+ | 2.12 | OAK |
| 20130805 | +110+ | 2.06 | OAK |
| 20130819 | +103+ | 2.32 | OAK |
| 20130902 | +164+ | 1.80 | OAK |
| 20130916 | +171+ | 1.87 | OAK |
| 20130930 | +178+ | 1.87 | OAK |
Grant Balfour Post Season Games
| Rank | WAA | IP | ERA | Gs | Gr | Tm |
|---|---|---|---|---|---|---|
| XXXXX | 0.22 | 2.7 | 0 | 0 | 2 | MIN |
| XXXXX | -0.23 | 12.3 | 4.38 | 0 | 13 | TBA |
| XXXXX | 0.18 | 4.7 | 1.93 | 0 | 5 | OAK |
| XXXXX | 0.18 | 19.7 | 3.2 | 0 | 0 | TOT |
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