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Perhaps this section should be called the lack of replacements.
There just isn't a lot of proven talent sitting on this roster. It certainly doesn't resemble the years of transition of old when the Pittsburgh Steelers could still be a playoff threat even as they retooled.
When Jerome Bettis left, Willie Parker was emerging. When Kimo von Oelhoffen retired, Brett Keisel was waiting in the wings. When Earl Holmes and Jason Gildon departed, James Farrior and Clark Haggans stepped up.
The list goes on. Perhaps the Steelers have had their fair share of luck over the years, but for whatever reason they've never had trouble restocking.
James Harrison is getting too old. Jason Worilds may or may not be an answer. Casey Hampton's replacement should be Steve McLendon, but he isn't proven completely either. There's no replacement for Larry Foote, Troy Polamalu, Ryan Clark or Rashard Mendenhall.
One draft won't fix all of those problems. There will be other areas that need help too for various reasons.
For any fan, the thought that a team that's always been able to grow replacements with seemingly little effort can no longer do so is very disturbing.