I know a lot of Colts fans were excited when the Colts signed Nix to a small, 1 year contract, earlier in the off-season.
But when it happened, I checked the film on him, and did not like what i saw. I figured the Colts were just taking a flier.
The Steelers did not release him because he was injured a year, no team releases a player due to a single injured season, if they believe he is still a Pro Bowler.
This is a few plays I saw on Nix, and why I believe he's been released.
https://youtu.be/5NNhj84Eyik