| Start Date | End Date | #Days | Status | MLB Team | Minor Team | 40-Man | Transaction Description |
| 2013-05-09 | Current | -- | Minors | Kansas City Royals | Omaha (AAA) | Yes | Assigned to Omaha (AAA) |
| 2013-04-21 | 2013-05-09 | 19 | Active | Washington Nationals | Yes | ||
| 2012-08-24 | 2013-04-16 | 236 | Active | Washington Nationals | Yes | Signed to 1-year contract extension thru 2013 | |
| 2012-07-31 | 2012-08-24 | 25 | Active | Washington Nationals | Yes | Activated from DL | |
| 2012-07-23 | 2012-07-31 | 9 | DL-15 | Washington Nationals | Syracuse (AAA) | Yes | Assigned to Syracuse (AAA) for rehab |
| 2012-07-04 | 2012-07-23 | 20 | DL-15 | Washington Nationals | Potomac (A+) | Yes | Assigned to Potomac (A+) for Rehab |
| 2012-05-28 | 2012-07-04 | 38 | DL-15 | Washington Nationals | Yes | DL-15 Groin soreness | |
| 2012-05-08 | 2012-05-28 | 21 | Active | Washington Nationals | Yes |
| Date | Notes |
| 2011-12-20 | Signed by Nationals |
| 2010-11-07 | Granted free agency |
| 2010-08-05 | Signed by Marlins |
| 2010-07-09 | Signed by Yankees |
| 2010-07-01 | Released by Cubs |
| 2010-01-06 | Signed by Cubs |
| 2001-06-09 | signed |
| Drafted: Selected by Arizona Diamondbacks in 7th round (218th overall) of 2001 Amateur Draft (June-Reg Phase) | |