I'm curious who else is on your bench if you're only rostering 4 RBs. You may have a flier WR that's more suitable to drop.
If I was pushed to answer, rest of season, Ball or McGahee, I'd take a shot on McGahee if my first 3 RBs are my definite starters every bye week. Even TRich was shut down the first two weeks, so a veteran off the street is likely to fail as well, but Ball isn't likely to make an impact any time soon either.
I added some more Qs on the end of my last thread, if you could respond again I'd appreciate it. And if you list your whole roster here, I'll come back and tell you what I think about other potential drops for McGahee.viewtopic.php?f=18&t=538979&p=3544523#p3544523
10 Team PPR
QB - MStafford(DET)
RB - APeterson(MIN), MForte(CHI), DSproles(NO), BTate(HOU), JBell(DET), LMiller(MIA), SVereen(NE)
WR - DBryant(DAL), TSmith(HOU), JGordon(CLE), EDecker(DEN), JJones(GB)
TE - Gronk(NE)