Indianapolis Colts quarterback Daniel Jones suffered an Achilles injury in Sunday's clash with the Jacksonville Jaguars, potentially dealing a huge blow to the team's playoff hopes.

Jones – who had been playing with a hairline fibula fracture in his left leg in recent weeks – collapsed to the turf clutching his right leg in a non-contact incident in the first quarter of Sunday's game.

The 28-year-old slammed his helmet to the ground in frustration following the incident before being helped off the field.

He later reappeared on the sidelines wearing a protective boot on his right leg.

Jones has been instrumental in leading a resurgent Colts team this season, helping the franchise build an 8-4 record that has left them entertaining hopes of mounting a deep run in the post-season.

The Colts have not reached the playoffs since the 2020 season. (AFP)