Additions
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 03/2004 |  | Simo Valakari | MF |  | Derby County | Derby |
| 02/2004 |  | Cory Gibbs | DF |  | FC St. Pauli | St. Pauli |
| 01/2004 | | Clarence Goodson | DF | |||
| 01/2004 | | Scott Garlick | GK |  | Colorado Rapids | Colorado Rapids |
| 01/2004 | | Steve Jolley | DF |  | New York RB | New York RB |
| 01/2004 |  | Milton Reyes | DF |  | D.C. United | DC United |
| 01/2004 | | Carey Talley | DF |  | Sporting Kansas City | Kansas City |
| 01/2004 | | David Wagenfuhr | DF | |||
| 01/2004 | | Ty Maurin | MF | |||
| 01/2004 | | Ramón Nuñez | MF | |||
| 01/2004 | | Eric Quill | FW | | Sporting Kansas City | Kansas City |
| 01/2004 | | John Trask | AS-CO | | D.C. United | DC United |
Departures
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 07/2004 | | Jason Thompson | FW | | D.C. United | DC United |
| 01/2004 | | D. J. Countess | GK |  | Chicago Fire | Chicago Fire |
| 01/2004 |  | Tenywa Bonseu | DF | | New York RB | New York RB |
| 01/2004 | | Brian Dunseth | DF |  | Bodens BK | Bodens BK |
| 01/2004 |  | Ezra Hendrickson | DF | | D.C. United | DC United |
| 01/2004 |  | Shavar Thomas | DF | | Sporting Kansas City | Kansas City |
| 01/2004 | | Chad Deering | MF |  | Dallas Tornado | Dallas Tornado |
| 01/2004 |  | Joselito Vaca | MF | | New York RB | New York RB |