Terms of the deal weren't immediately available. As a restricted free agent a year ago, Seward signed an offer sheet with the Patriots. The Panthers matched the offer and kept him for the season.
Seward, 26, spent four seasons in a backup role for the Panthers. He played in 40 games and had two starts. The Colts were down a couple of starting linebackers from last year. The addition of Seward started to replenish the team's linebacker depth.