I would say Forsett, because Addai is banged up and if the Colts go up big and quick, which could easily happen then the Colts will lean on Hart, since Brown is out.
I'd go Forsett as well though I think Addai will get a TD. But I think Colts get up big and "rest" Addai when the lead is secure due to his lingering injuries. It'd be an easier decision if Brown were healthy then I'd definitely say no to Addai.
Standard Scoring, 8 Team $ League, Start...QB,QB,RB,RB,WR,WR,WR,FLEX X3,TE,K,DEF. QB- RB- WR- TE- K- DEF-