| 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. |
| Collin Balester | Washington Nationals | 2009 | 2009 | 1 | $ 401,000 | | |
| Josh Bard | Boston Red Sox | 2009 | 2009 | 1 | $ 600,000 | | Minor league contract after being released by Red Sox |
| Joe Beimel | Washington Nationals | 2009 | 2009 | 1 | $ 2,000,000 | | |
| Ronnie Belliard | Washington Nationals | 2008 | 2009 | 2 | $ 3,500,000 | $ 1.75m | Extension signed during 2007 season |
| Jay Bergmann | Washington Nationals | 2009 | 2009 | 1 | $ 439,000 | | |
| Roger Bernadina | Washington Nationals | 2009 | 2009 | 1 | $ 400,000 | | |
| Jamie Burke | Seattle Mariners | 2009 | 2009 | 1 | $ 400,000 | | Minor league contract |
| Sean Burnett | Pittsburgh Pirates | 2009 | 2009 | 1 | $ 408,500 | | |
| Daniel Cabrera | Washington Nationals | 2009 | 2009 | 1 | $ 2,600,000 | | |
| Alex Cintron | Washington Nationals | 2009 | 2009 | 1 | $ 650,000 | | Minor League Contract |
| Tyler Clippard | Washington Nationals | 2009 | 2009 | 1 | $ 400,000 | | |
| Jesus Colome | Washington Nationals | 2009 | 2009 | 1 | $ 400,000 | | |
| Ian Desmond | Washington Nationals | 2009 | 2009 | 1 | $ 400,000 | | |
| Ross Detwiler | Washington Nationals | 2009 | 2009 | 1 | $ 400,000 | | |
| Elijah Dukes | Washington Nationals | 2009 | 2009 | 1 | $ 411,500 | | |
| Adam Dunn | Washington Nationals | 2009 | 2010 | 2 | $ 20,000,000 | $ 10.00m | |
| Marco Estrada | Washington Nationals | 2009 | 2009 | 1 | $ 400,000 | | |
| Jesus Flores | Washington Nationals | 2009 | 2009 | 1 | $ 411,500 | | |
| Victor Garate | Los Angeles Dodgers | 2009 | 2009 | 1 | $ 400,000 | | |
| Alberto Gonzalez | Washington Nationals | 2009 | 2009 | 1 | $ 400,000 | | |
| Cristian Guzman | Washington Nationals | 2009 | 2010 | 2 | $ 16,000,000 | $ 8.00m | |
| Joel Hanrahan | Washington Nationals | 2009 | 2009 | 1 | $ 420,000 | | |
| Willie Harris | Washington Nationals | 2009 | 2010 | 2 | $ 3,000,000 | $ 1.50m | |
| Anderson Hernandez | Washington Nationals | 2009 | 2009 | 1 | $ 400,000 | | |
| Livan Hernandez | New York Mets | 2009 | 2009 | 1 | $ 1,000,000 | | Minor league contract |
| Mike Hinckley | Washington Nationals | 2009 | 2009 | 1 | $ 400,000 | | |
| Nick Johnson | Washington Nationals | 2007 | 2009 | 3 | $ 16,500,000 | $ 5.50m | |
| Austin Kearns | Washington Nationals | 2007 | 2009 | 3 | $ 17,500,000 | $ 5.83m | Club option for 2010 ($10m), Avoided arbitration |
| Logan Kensing | Washington Nationals | 2009 | 2009 | 1 | $ 660,000 | | Avoided arbitration |
| John Lannan | Washington Nationals | 2009 | 2009 | 1 | $ 424,000 | | |
| Wil Ledezma | Washington Nationals | 2009 | 2009 | 1 | $ 750,000 | | Minor league contract |
| Mike MacDougal | Chicago White Sox | 2007 | 2009 | 3 | $ 6,450,000 | $ 2.15m | Avoided arbitration. Club option for 2010 ($3.75m) |
| J.D. Martin | Washington Nationals | 2009 | 2009 | 1 | $ 400,000 | | Minor league contract |
| Shairon Martis | Washington Nationals | 2009 | 2009 | 1 | $ 400,000 | | |
| Justin Maxwell | Washington Nationals | 2009 | 2009 | 1 | $ 400,000 | | |
| Lastings Milledge | Washington Nationals | 2009 | 2009 | 1 | $ 452,000 | | |
| Garrett Mock | Washington Nationals | 2009 | 2009 | 1 | $ 400,000 | | |
| Nyjer Morgan | Pittsburgh Pirates | 2009 | 2009 | 1 | $ 411,500 | | |
| Mike Morse | Seattle Mariners | 2009 | 2009 | 1 | $ 400,000 | | |
| Wil Nieves | Washington Nationals | 2009 | 2009 | 1 | $ 445,000 | | |
| Scott Olsen | Washington Nationals | 2009 | 2009 | 1 | $ 2,800,000 | | Avoided arbitration |
| Pete Orr | Washington Nationals | 2009 | 2009 | 1 | $ 600,000 | | Minor league contract |
| Corey Patterson | Washington Nationals | 2009 | 2009 | 1 | $ 800,000 | | Minor league contract |
| Saul Rivera | Washington Nationals | 2009 | 2009 | 1 | $ 475,000 | | |
| Steven Shell | Washington Nationals | 2009 | 2009 | 1 | $ 425,000 | | |
| Craig Stammen | Washington Nationals | 2009 | 2009 | 1 | $ 400,000 | | Contract purchased from minors |
| Julian Tavarez | Washington Nationals | 2009 | 2009 | 1 | $ 500,000 | | Minor league contract |
| Ron Villone | New York Mets | 2009 | 2009 | 1 | $ 600,000 | | Minor league contract |
| Kip Wells | Washington Nationals | 2009 | 2009 | 1 | $ 500,000 | | Minor League Contract |
| Josh Willingham | Washington Nationals | 2009 | 2009 | 1 | $ 2,950,000 | | Avoided arbitration |
| Ryan Zimmerman | Washington Nationals | 2009 | 2013 | 5 | $ 45,000,000 | $ 9.00m | |