How many teams are in your league? I'm sure there are other RBs on waiver wire that have a better upside than Moreno if you are weak at that position.
12 Team, Standard ESPN Scoring:
QB - Stafford, Fitzpatrick
RB - Peterson, Forte, Battle, McGahee, Tate, Addai
WR - Wallace, Smith, Breaston, Moore
TE - Gates
DEF - 49ers, Cowboys
K - Kasay