Kevin Greene for the Hall of Fame

The list of semi-finalists for the next Hall of Fame class came out not too long ago. I've read several analyses of the list. Why is it that Kevin Greene never gets much coverage? Granted, I may be a bit partial to him as he was a star on the Steelers. But if nothing else, the man finished his career #2 on the all time (for what that's worth) sack list, just behind Reggie White. Plus he was a key fixture on the Steelers defense of mid-90's that was pretty dang dominant, and was a member of the 1990's all decade team. Yet, he doesn't seem to warrant too much attention.