AP

The Colts’ defense looked a little lost last night, missing the pass rush provided by Robert Mathis.

They’ll need to find a way to fix it.

Multiple league sources tell PFT that Mathis suffered a torn Achilles last week while working out on his own in Atlanta. His season is now over.

Mathis had three games remaining on his suspension for violating the PED policy, which he claimed arose from taking a fertility drug.

But now, they won’t be getting him back for the final three-fourths of the season.

The 33-year-old Mathis had 19.5 sacks in 2013, his first without Dwight Freeney. The Colts had given him a four-year, $36 million deal prior to the 2012 season, and he’s due to make $5 million this year and $7 million in 2015.

Because the injury happened away from the team facility, the Colts could place Mathis on the non-football injury list and withhold this year’s money, setting the stage to part ways with an aging and banged-up player this offseason.