Thomas' reaction to the lack of a resolution was clear in his post: "The disrespect has been noted and will not be forgotten".
A source confirmed to ESPN's Dan Graziano that there's no new deal in place between Seattle and Thomas.
Seattle opens the season on Sunday at Denver.
With all hope of him being on a new team, under a new contract seemingly lost, Thomas took to Instagram to announce he was going to report to the Seahawks.
Thomas wrote on Instagram, accompanied by a picture of himself in the Seahawks' weight room, that: "I worked my whole life for this...." They even upped their offer to a second as of this morning. He urged that the team either pay him or trade him to a team willing to commit to him long-term. Those are all at team discretion, though, and Ian Rapoport of the NFL Network reported that the Seahawks "did agree to wipe away nearly all of his fines".
In a post for The Players' Tribune earlier this summer, Thomas wrote that he was shaken by the injuries suffered by Richard Sherman and Kam Chancellor - two other members of Seattle's "Legion of Boom" secondary - in a Thursday night game last season. Time will tell, but for now, Thomas will remain in Seattle. The Seahawks wanted more.
The Seahawks, though, said no. Seattle believes Thomas is worth more than a second-round pick.
Seattle will have to make a corresponding roster move to account for Thomas, though they could also initially put him on an exempt list.
Dallas had not been the only club interested in trading for the Seahawks safety, as NFL Network's Tom Pelissero reported Friday, "multiple teams" had been in the hunt.