It's not very often a running back goes from recovering from a nasty knee injury to a bell-cow back in just a year, but Gurley has done just that.
Another high volume, highly productive day on Sunday may make it difficult to buy on Gurley, but his early season injury makes him an interesting prospect. Those who drafted him surely expected a lengthy absence, and likely built depth at the RB situation in case things went sour. That depth means they don't likely need Gurley, increasing the odds they'd be willing to move the (likely) Rookie of the Year.
Either way, a stellar defense and an offense with no other options makes Gurley a potential star, and volume doesn't look to be a concern.