The Jets already have Sanchez, Tim Tebow, Greg McElroy and Matt Simms undercontract, and have expressed interest in David Garrard and possibly Brady Quinn.
Pompey manager Harry Redknapp had been linked with Distin a year ago when he was still undercontract, so was delighted to see off reported late interest from Liverpool to get his man.
Ceglia claims he is also entitled to an extra 34% stake under the contract based on the date the site was completed, giving him an 84% ownership interest in the company that eventually became Facebook.