INDIANAPOLIS - The Indianapolis Colts have lost running back Marlon Mack to a season-ending Achilles tendon injury, according to sources first reported by ESPN's Mike Wells.
Mack went down to the turf after a short catch-and-run in the second quarter of Sunday's game in Jacksonville.
He was helped off the field by trainers. After the game, Colts Head Coach Frank Reich said Mack would have further scans on Monday.
Reich is scheduled to talk to the media at 4 p.m.