I know the difference quite well. Roman Harper was not asked to cover Calvin Johnson. He was asked to perform exactly the kind of coverage duties that all strong safeties have to do. And he stunk at it the majority of the time.

What makes you believe the Saints agree with you? Did they ever say he was great in coverage? Did they not just release him?

They kept him around this long because for years they invested nothing into the defense and didn't view his position as a priority. He was used as an extra linebacker for all intents and purposes, and everyone knows that. If he were "great" in coverage 90% of the time, they would not have drafted a safety in the first round last year, and spent 58 million or whatever it was on a another this year. They could have just kept the crap they already had.

But evidently, the Saints identified a problem and have finally decided to do something about it.