Chuck Noll used to say the Steelers would take the best player available to his team when it came time for the team to draft. And back in the days before free agency, that made a lot of sense.
First, when Noll first got to Pittsburgh, the Steelers needed an influx of talent everywhere. Then, once the team got good, he could afford to stash players on his roster. After all, they couldn't go anywhere else unless the Steelers cut them.