D.C. United 2021
| P | # | Player | Born | Height | Weight | Contract | |
|---|---|---|---|---|---|---|---|
| GK | Bill Hamid | 1990-11-25 | 191 | 102 | |||
| D | Bobby Boswell | 1983-03-15 | 188 | 84 | |||
| D | Chris Korb | 1987-10-08 | 175 | 73 | |||
| D | Jalen Robinson | 1994-05-08 | 173 | 66 | |||
| D | Kofi Opare | 1990-10-12 | 188 | 86 | |||
| D | Sean Franklin | 1985-03-21 | 178 | 70 | |||
| D | Steve Birnbaum | 1991-01-23 | 188 | 82 | |||
| D | Taylor Kemp | 1990-07-23 | 180 | 69 | |||
| M | Andrew Driver | 1987-10-20 | 175 | 69 | 2018-06-30 | ||
| M | Chris Pontius | 1987-05-12 | 182 | 77 | 2012 | ||
| M | Davy Arnaud | 1980-06-22 | 183 | 75 | |||
| M | Jared Jeffrey | 1990-06-14 | 178 | 75 | |||
| M | Luis Silva | 1988-12-10 | 180 | 74 | |||
| M | Nick DeLeon | 1990-07-17 | 178 | 77 | |||
| F | Alhaji Kamara | 1994-04-10 | 180 | 73 | |||
| F | Chris Rolfe | 1983-01-17 | 172 | 65 | |||
| F | Collin Martin | 1994-11-09 | 180 | 64 | |||
| F | Conor Doyle | 1991-10-13 | 188 | 78 | |||
| F | Eddie Johnson | 1984-03-31 | 183 | 82 | 2011 | ||
| F | Edgar Fabián Espíndola | 1985-05-04 | 175 | 73 | 2013 | ||
| F | Jairo Arrieta | 1983-08-25 | 173 | 70 | |||
| F | Miguel Aguilar | 1993-08-30 | 175 | 78 |
| Date | Player | From | To | Status | Src |
|---|---|---|---|---|---|
| 30.Jul | Kennedy Igboananike (F) | Chicago Fire | D.C. United | Confirmed | |
| 26.May | Markus Halsti (M) | D.C. United | Free Agent | Confirmed | |
| 11.May | Alhaji Kamara (F) | Retired | D.C. United | Confirmed | |
| 29.Mar | Andrea Mancini (F) | Free Agent | D.C. United | Confirmed | |
| 9.Jun | Michael Seaton (F) | D.C. United | IK Sirius | Rumour | |
| 4.Jun | Michael Seaton (F) | Örebro SK | D.C. United | Confirmed | |
| 31.Mar | Michael Seaton (F) | D.C. United | Örebro SK | Confirmed | |
| 12.Jan | Markus Halsti (M) | Malmö FF | D.C. United | Confirmed | |
| 8.Aug | Archimede Morleo (D) | Bologna FC | D.C. United | Rumour | |
| 16.May | Robbie Russell (D) | D.C. United | Retired | Confirmed |