I've been saying this ever since the draft. http://bleacherreport.com/articles/2778455-every-nfl-teams-biggest-mistake-so-far-this-offseason Ryan Shazier's tragic neck injury made inside linebacker one of the Steelers' biggest needs going into the offseason. Though there were plenty of tackle machines available in free agency and a strong, athletic group in the draft, the Steelers came out of the offseason with only Jon Bostic as a replacement for Shazier. Perhaps the Steelers have future plans for veteran safety Morgan Burnett or first-round pick Terrell Edmunds to drop into the box and play linebacker in a few subpackages. That would help negate some of the speed and versatility lost in Shazier, who was among the NFL's fastest and most reliable coverage linebackers prior to his injury. Bostic revived his fading career with a 97-tackle season in Indianapolis last season, but the Steelers going from Shazier to Bostic would be a drastic drop-off in the middle of Pittsburgh's defense in 2018. Not doing more to add help at the position could come back to bite the Steelers.