The Broncos placed Harvey (knee) on injured reserve Saturday, Ian Rapoport of NFL Network reports.
Harvey was already ruled out for Sunday's contest against the Chiefs, but now that he's on IR, the second-year running back will be required to miss at least the next four games. That means the earliest that he is eligible to return is Week 13 against the Dolphins on Sunday, Dec. 6. In Harvey's absence, the Broncos' backfield will be led by J.K. Dobbins and rookie fourth-rounder Jonah Coleman.