Denver head coach Nathaniel Hackett acknowledged Monday that Boone (ankle) might be done for the season, Aric DiLalla of the Broncos' official site reports. "It doesn't look good right now," Hackett said of Boone.
DiLalla notes that the team still is evaluating the ankle injury Boone sustained in Sunday's loss to the Chiefs, but if the running back ends up missing time, the Broncos will need to add depth behind Latavius Murray and Marlon Mack. Devine Ozigbo is currently a member of Denver's practice squad and would likely be first in line for a promotion if Boone is sidelined for the Broncos' Week 15 game against the Cardinals.