Castillo was a DP only for his first year in the league, due to his transfer fee. IIRC, he's making less than $100,000 now. Meanwhile, according to the MLSPU's salary list, Hassli isn't even making league maximum anymore. Dallas' only DP at the moment is David Ferreira.
Considering the amount of money they've spent since 1996 and the types of big time name players who have passed through their doors without ever winning anything, I'd say its the NY RED METROS....