Once again, Week 4 showed us that the NFL is an unpredictable beast and that opportunity can be king.

While Matt Asiata, who rushed 20 times for 78 yards and walked into the end zone three times, saw his own opportunities, there really wasn't much for Donald Brown, who many thought would be in store for plenty of touches in a game featuring a Chargers lead.

But it's time to look forward to Week 5 and find some plays who can step in for your fantasy squad. With just the London teams (the Dolphins and Raiders) on bye, you probably won't be without too many fantasy starters, but if you're looking to replace some struggling players, you'll probably need to turn to some Week 5 sleepers.