Colts RB Marlon Mack suffered an ankle injury in the 1st half of Sunday's game against the Jaguars and is officially questionable to return. His absence leaves Nyheim Hines and Jonathan Taylor in Indianapolis' backfield.

Update: The Colts have ruled Mack out for the rest of the game. NFL Network's Tom Pelissero reports that the Colts fear a torn Achilles' tendon for Mack.

