Posted by ESPN.com's Tim Graham
That development isn't indicative of any looming progress between the Bills and Pro Bowl T Jason Peters, who's embroiled in a contract dispute of his own.
The connection between Peters and Jackson -- aside from the fact they're the last two holdouts in the NFL -- is they share the same agent, Eugene Parker.
But that doesn't mean Peters and Jackson are using the same playbook.
Multiple NFL sources have told ESPN.com there has been no movement between the Bills and Peters, and the club doesn't expect Jackson's situation to have any bearing on Peters' holdout.
Peters and Jackson have different circumstances. Jackson was entering the final season of the five-year, $7 million contract he signed as a rookie. Peters still has three years remaining on a contract that already has been renegotiated once, giving him a maximum annual salary of $4 million.
Bills chief operating officer Russ Brandon has said they absolutely will not negotiate with Peters until he shows up. They are hammering out a new deal for WR Lee Evans, who's with the team.
(For the record, Jacksonville Jaguars rookie DE Derrick Harvey also hasn't reported to camp, but he's not technically a holdout. Harvey isn't allowed to show up even if he wanted to because he hasn't signed a contract. You can't hold out if you're not under contract.)