Initial tests indicate that Pacheco suffered a fractured fibula in Sunday's 26-25 win over the Bengals, Ian Rapoport of NFL Network reports.
Pacheco left the stadium Sunday in a walking boot and crutches, and he looks poised to miss some time, although no official recovery timeline has been provided yet. Additional work in the Kansas City backfield will be available for Samaje Perine and rookie Carson Steele.