| Year | Team | G | GS | W | L | SV | CG | SHO | IP | H | R | ER | HR | BB | K | ERA | WHIP |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2007 | 13 | 5 | 1 | 0 | 0 | 0 | 0 | 33.2 | 25 | 12 | 11 | 3 | 10 | 28 | 2.94 | 1.04 | |
| 2008 | 15 | 0 | 4 | 2 | 1 | 0 | 0 | 33.1 | 28 | 17 | 15 | 2 | 17 | 34 | 4.05 | 1.35 | |
| 2009 | 29 | 0 | 4 | 0 | 13 | 0 | 0 | 46 | 35 | 14 | 13 | 4 | 14 | 39 | 2.54 | 1.07 | |
| 2010 | 54 | 0 | 6 | 3 | 1 | 0 | 0 | 67.1 | 60 | 27 | 25 | 5 | 29 | 46 | 3.34 | 1.32 | |
| 2011 | Nationals | 6 | 0 | 1 | 0 | 0 | 0 | 0 | 4.2 | 5 | 2 | 2 | 1 | 1 | 7 | 3.86 | 1.29 |
| 2011 | 35 | 0 | 1 | 2 | 1 | 0 | 0 | 32 | 37 | 17 | 16 | 2 | 23 | 38 | 4.50 | 1.88 | |
| 2012 | 46 | 0 | 3 | 0 | 3 | 0 | 0 | 48 | 37 | 20 | 15 | 5 | 36 | 43 | 2.81 | 1.52 | |
| Career Total | 6 | 0 | 1 | 0 | 0 | 0 | 0 | 4.2 | 5 | 2 | 2 | 1 | 1 | 7 | 3.86 | 1.29 | |
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In order to make room on the 40-man roster for newly acquired infielder Cesar Izturis, the Washington Nationals have designated left-handed pitcher Atahualpa Severino for assignment, the team has announced.
Wire Taps: Washington Nationals Reportedly Held Private Workout With Cuban OF Yoenis Cespedes.
