Considering this season had "trainwreck" written all over it, I'm going to say the biggest disappointments this year are Wilson Chandler, Jordan Hill, and Gallo.
I never thought Chandler was going to be a star but I thought he'd develop into a reliable 15-7 guy that was a starter for a decade in the L. Right now it looks like he'll be lucky to survive past the rookie paygrade.
Jordan Hill is a disappointment because he hasn't played. Remains to be seen why he hasn't played but I would have liked to have seen some knee jerk threads along the lines of "HILL = AMARE ON AMPHETAMINE!!1!1!!!"
And Gallo has been disappointing not because of his performance but because of the way
built him up in the preseason. I think my expectations were high and unfair.