DT John Ridgeway III and a 7th round pick traded to the Saints for a 6th round pick

I've heard that too and that's the only other way this move could make sense. I don't understand though why we wouldn't just IR him since we can't cut an injured vet outright. Perhaps that's coming.

But even when we have carried a second nose on the 53, which isn't all the time, we typically make that guy a healthy scratch anyway. So why trade for one?

If you IR him, you have to pay him. If you wait until he is healthy and then trade/cut him you can save some money. Not sure how much because I don't know how his contract is structured or what the amount is.

But, like I said above, our run defense was bad last year and I think Saunders was part of that. So any move to improve the run defense is fine by me.