| Contract data is available from the mid 2000s until the present day. Shaded records are players who signed multi-year contracts. The list of contracts may not be complete. Visit the Data Store if you're interested in purchasing the contract data. |
| Rick Ankiel | Washington Nationals | 2012 | 2012 | 1 | $ 1,250,000 | | Minor League Contract |
| Roger Bernadina | Washington Nationals | 2012 | 2012 | 1 | $ 493,500 | | |
| Sean Burnett | Washington Nationals | 2011 | 2012 | 2 | $ 3,950,000 | $ 1.98m | Avoided arbitration. Mutual option for 2013 |
| Brett Carroll | Washington Nationals | 2012 | 2012 | 1 | $ 414,000 | | Minor league contract |
| Tyler Clippard | Washington Nationals | 2012 | 2012 | 1 | $ 1,650,000 | | Avoided arbitration |
| Mark DeRosa | Washington Nationals | 2012 | 2012 | 1 | -- | | |
| Ian Desmond | Washington Nationals | 2012 | 2012 | 1 | $ 512,500 | | |
| Ross Detwiler | Washington Nationals | 2012 | 2012 | 1 | $ 485,000 | | |
| Zach Duke | Houston Astros | 2012 | 2012 | 1 | $ 414,000 | | Minor league contract |
| Danny Espinosa | Washington Nationals | 2012 | 2012 | 1 | $ 506,000 | | |
| Jesus Flores | Washington Nationals | 2012 | 2012 | 1 | $ 850,000 | | Avoided arbitration |
| Gio Gonzalez | Washington Nationals | 2012 | 2016 | 5 | $ 42,000,000 | $ 8.40m | Options for 2017-2018 |
| Tom Gorzelanny | Washington Nationals | 2012 | 2012 | 1 | $ 2,100,000 | | Avoided arbitration |
| Bryce Harper | Washington Nationals | 2011 | 2015 | 5 | $ 9,900,000 | $ 1.98m | $6.25m signing bonus |
| Cesar Izturis | Milwaukee Brewers | 2012 | 2012 | 1 | $ 414,000 | | Minor league contract |
| Edwin Jackson | Washington Nationals | 2012 | 2012 | 1 | $ 11,000,000 | | |
| Adam LaRoche | Washington Nationals | 2011 | 2012 | 2 | $ 16,000,000 | $ 8.00m | Mutual option for 2013 |
| Brad Lidge | Washington Nationals | 2012 | 2012 | 1 | $ 1,000,000 | | |
| Steve Lombardozzi | Washington Nationals | 2012 | 2012 | 1 | $ 481,000 | | |
| Carlos Maldonado | Washington Nationals | 2012 | 2012 | 1 | $ 414,000 | | Minor league contract |
| Ryan Mattheus | Washington Nationals | 2012 | 2012 | 1 | $ 481,000 | | |
| Tyler Moore | Washington Nationals | 2012 | 2012 | 1 | $ 480,000 | | |
| Mike Morse | Washington Nationals | 2012 | 2013 | 2 | $ 10,500,000 | $ 5.25m | Avoided arbitration |
| Xavier Nady | Washington Nationals | 2012 | 2012 | 1 | $ 700,000 | | Minor League |
| Eury Perez | Washington Nationals | 2012 | 2012 | 1 | $ 480,000 | | |
| Ryan Perry | Washington Nationals | 2012 | 2012 | 1 | $ 480,000 | | |
| Wilson Ramos | Washington Nationals | 2012 | 2012 | 1 | $ 491,250 | | |
| Henry Rodriguez | Washington Nationals | 2012 | 2012 | 1 | $ 491,000 | | |
| Jhonatan Solano | Washington Nationals | 2012 | 2012 | 1 | $ 480,000 | | |
| Craig Stammen | Washington Nationals | 2012 | 2012 | 1 | $ 485,000 | | |
| Drew Storen | Washington Nationals | 2012 | 2012 | 1 | $ 498,750 | | |
| Chad Tracy | Colorado Rockies | 2012 | 2012 | 1 | $ 414,000 | | Minor league contract |
| Chad Tracy | Washington Nationals | 2012 | 2012 | 1 | $ 1,000,000 | | |
| Chad Tracy | Washington Nationals | 2012 | 2012 | 1 | $ 750,000 | | Minor league contract |
| Chien-Ming Wang | Washington Nationals | 2012 | 2012 | 1 | $ 4,000,000 | | |
| Jayson Werth | Washington Nationals | 2011 | 2017 | 7 | $ 126,000,000 | $ 18.00m | $4m signing bonus |
| Ryan Zimmerman | Washington Nationals | 2009 | 2013 | 5 | $ 45,000,000 | $ 9.00m | |