Update: Colts' Marlon Mack (ankle/Achilles) will not return in Week 1

Indianapolis Colts running back Marlon Mack has been ruled out for the rest of Week 1's game against the Jacksonville Jaguars with an ankle/Achilles injury.

What It Means:

Mack suffered a non-contact ankle injury during the first half of Sunday's game and will not return. NFL Network's Tom Pelissero reported that it may have been an Achilles tear.

Mack will end the game with 4 carries for 26 yards and 3 receptions for 30 yards.