It began on March 22, 2009, with a 2–2 draw at the Los Angeles Galaxy and ended on October 22, 2009, at the Kansas City Wizards by the same 2–2 scoreline.

D.C. United was involved in the following off-season activity:[2] The 2009 MLS SuperDraft took place on January 15, 2009.

With draft order determined by regular and post-season record, United received the sixth pick in each round.

Additionally, United acquired the Colorado Rapids' first-round pick (#7 overall) and Houston Dynamo's second-round (#26 overall).

Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.