Indianapolis Colts

Summer of defense: Colts add free agent LB Jon Bostic

Published Apr. 20, 2017 6:44 p.m. ET

INDIANAPOLIS -- The Indianapolis Colts have signed inside linebacker Jon Bostic.

Terms of the deal were not released.

Bostic has played four seasons in the NFL, most recently with Detroit in 2016. The 6-foot, 245-pounder has started 18 of 40 games and has 140 tackles.

He had 55 tackles as a rookie with Chicago in 2013 and followed that season with a career-high 84 tackles in 2014. The Bears then traded him to New England in 2015, where he played primarily on special teams before landing with the Lions.

Indy has focused heavily on improving at linebacker this offseason. Of the 13 free agents new general manager Chris Ballard has signed since early March, five are linebackers.