Colts running back Marlon Mack exited the first preseason game with a hamstring injury. The severity is unknown.
These are the kinds of injuries that can linger throughout the year, or lead to other issues for running backs. Monitor this closely. Rookie Jordan Wilkins is likely the next in line for early-down carries, while Nyheim Hines is expected to have a sizable receiving load.
Ingram will help alleviate some of Kamara's workload in certain situations. Ingram has plenty of experience in New Orleans and makes sense as a backup. He remains a lower RB4 with upside should Kamara miss time.