Go with Charles here and don't think twice about it.
1) He's a running back, so he'll get guaranteed touches that Chambers and Crabtree won't
2) He's been on fire recently
3) Denver's run defense has proven to be relatively vulnerable, so 25 or so touches should yield at least 100 total yards
4) He's getting all of KC's goal line touches since their backfield is banged up, barring a random fullback vulture
Here's mine: http://www.fantasyfootballcafe.com/forums/viewtopic.php?f=19&t=463571