A lot of cards were back door when Coll Edge went under. Plus when the inventory was sold by bankrupt court. They got out that way also. I have a few and seen a lot more of them for sale. I knew a guy that worked for Coll Edge at the end. He has/had a lot of John Elway cards that never was sold normally.
From him : When they printed the cards in sheets most of the time there was more cards printed then what the SNs was needed. So for this card there may have had 3500 cards printed but only 3100 was needed for SNed.
This appear to be with all the manufacturers not just Coll Edge. As you see them on E-bay and other sites all the time. 2002 Pacific is an other one that I see a lot of.
He told me a lot of stuff. Do I believe him on all of it. Who knows