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The Colts have gotten healthier in the secondary of late, but they’ve lost a linebacker for the rest of the season.

The team announced Tuesday that outside linebacker Trent Cole has been placed on injured reserve. Cole has been dealing with a back injury that forced him to miss Indy’s Week Two loss to the Broncos and was listed as questionable for last Sunday’s game, but was able to play in the victory over the Chargers.

Cole assisted on a tackle against San Diego, leaving him with three on the season, and had 32 tackles and three sacks during his first season with the Colts. Cole spent the first 10 years of his career with the Eagles before joining the Colts as a free agent last year.

The Colts are left with Robert Mathis, Erik Walden, Akeem Ayers and Curt Maggitt at outside linebacker. They could add another to fill Cole’s roster spot and they’ll need to find a player with a valid passport if they want to do it for this week’s London game against the Jaguars.