Oliver was carted off the field during Sunday's preseason game against the Vikings with a right Achilles' injury.
At first glance, this doesn't look good for Oliver, who entered the game as the team's No. 3 back behind Melvin Gordon and Danny Woodhead. If he's forced to miss time, Dreamius Smith and Kenneth Farrow are next up on the team's depth chart, though with NFL cut-downs looming, there figures to be some other options for the Chargers to consider.