Mack (concussion) may not be available to play in Sunday's game against the Jaguars, Mike Chappell of Fox 59 News Indianapolis reports.
Mack suffered the concussion in the fourth quarter of the Colts' 27-24 win over Miami in Week 12, finishing with 85 yards on 15 carries and 11 yards on two receptions. His status for Sunday will largely be out of the Colts' control, as it will instead depend on his ability to pass through every stage of the concussion protocol. An absence would leave Nyheim Hines and Jordan Wilkins as the leaders of the Indianapolis backfield against a Jaguars defense that has given up just five touchdown to running backs all season. Jacksonville got the best of Mack in Week 10, limiting him to 29 yards on 12 carries and nine yards on two catches in a 29-26 Indianapolis victory.