The defensive line starters are the only ones on the defense that are pretty much locked in heading into camp. But they have a lot -- a whole lot -- of guys from which to find their depth.
Much like the offensive line, the Steelers' 2015 defensive line is most likely going to look virtually unchanged, at least among the starters. The similarities continue, though, as the backups are likely to look a lot different.
The starting lineup of Cameron Heyward, Steve McLendon and Stephon Tuitt are becoming a solid unit.