No one said they would bench him. It's possible he shares carries, gets the receptions but loses the short yardage stuff. Or the Raiders use them at the same time. No one really knows until both of them get healthy at the same time for once.
I was responding to azprof's statement that he feels Bush will be the starting RB from here on out, which is what I meant by McFadden getting benched. I doubt that happens - I think what you're suggesting above is likely to be the absolute worst case for McFadden from here on out, so let's work off of that. if you take out QB runs, the Raiders are averaging about 25 carries per game so far. Let's assume that stays constant (although I actually think Oakland would prefer to run it 30+ times per game if possible) and there's a 50/50 split between both backs - McFadden's averaging 4.6 ypc, so that would give him around 55 ypg on 12 carries. That's not great, but he's also averaging 4 catches and 40 yards per game, and I don't think Bush is going to take many receptions from him at all. Even if you knocked him down to 3 catches/30 yards per game, he'd still be averaging around 85 ypg combined plus the receptions. He's not going to be the goal-line back, but he wasn't doing much goal-line work anyway, and with his speed and explosiveness I think he's still a good bet for around 4-5 TDs combined. so in a PPR league he'd still be averaging double-digit points per game, and his owners probably drafted him in the double-digit rounds. And I think that's his floor - I think if he's healthy going forward, it's going to be at least a 60-40 workload split in favor of McFadden, possibly even higher. I admit I could be completely wrong, but I think taking everything into account - his fantasy draft position, talent, outstanding production so far, weak schedule going forward, and the desire by management to see their former #1 pick succeed - that the reward far outweighs the risk with this guy. So I don't understand why people are so quick to want to sell him off. I'd much rather hold onto him at this point - if he falls off the map, you didn't lose any big investment, and if he continues his production, you picked up a huge late-round gem.