Mack was a limited participant at Wednesday's practice due to an ankle injury.
Mack previously dealt with a hamstring injury, so the ankle issue is something new. His status will be updated based on his level of practice participation the next two days, but assuming he's able to play Sunday against the Raiders, Mack looks like a solid Week 8 lineup option. He cemented his role as the Colts' top back in the Week 7 triumph over the Bills, carrying 19 times for 126 yards and a score and catching two passes for 33 yards and another touchdown.