Castro-Fields (hamstring) cleared waivers Wednesday and reverted to injured reserve, per the NFL's official media site.
Castro-Fields appeared to pick up this injury during the second preseason game. The 2022 sixth-round pick out of Penn State has played just 12 regular-season games since entering the league, posting four tackles (three solo). He'll remain on injured reserve the rest of the season unless he reaches an injury settlement with the team.