United acquired De Rosario in June. In 18 games for D.C., he recorded 13 goals and seven assists. Overall, in 33 games this season, which also included stints with Toronto and New York, he had a league-leading 16 goals and 12 assists.
The MVP award is the midfielder's first. He becomes the fourth United player to be league MVP, previously won by Marco Etcheverry (1998), Christian Gomez (2006) and Luciano Emilio (2007).
For me, this is the most meaningful individual honor of my career, De Rosario said. I couldnt have achieved this without my teammates, and Im grateful to the players, coaches, fans, media and people at MLS for recognizing me. That said, Im disappointed not to be playing in the MLS Cup Playoffs right now, and my goal is to get D.C. United back to where it belongs in 2012.
United coach Ben Olsen said: Dwayne changed our entire team this season. With him we were always one play away from changing the game. He is truly a special player and he deserves this honor. This award is long overdue. Dwayne has been one of the best players in MLS for quite some time.