Fantasy football managers need to find depth at every position, but it's especially critical to have at the running back spot.
The same injury concerns that have NFL teams wary of paying a premium for running backs should have fantasy managers looking to back up their best options at the position. Plus, the same workload splits that have cut into the carries of most starting running backs have also opened the door for less heralded ones to play their way into a bigger role.
That's a long-winded way of saying late-round sleeper running backs should be a focus for all fantasy managers.