According to Brian McIntyre:
— Brian McIntyre (@brian_mcintyre) April 26, 2013
Left Tackle D'Brickashaw Ferguson has restructured his contract and saved the team $5.128 million in 2013 cap space. This might be if the team is trying to save some money so they can trade for Chris Ivory, which is what I suspect is happening. A new contract for Ivory may cost in the $2-3mil range, per year.
I suspect that, as a result of this transaction, we are about to see Chris Ivory become a New York Jet.