So I already know that I'm going to receive many comments regarding this one.
"I can't believe this list, this list is terrible," and so on.
But oh well.
Sorry, had to get that out.
Anyway, what I've done is put the top defensive free-agent signings in order of importance/value to their new teams. This does not include free agents who re-signed.
It doesn't necessarily mean they are the "biggest" names, but I had to organize this somehow.
I think we all know who No. 1 is, but what about the other 24?