New England linebacker Junior Seau was active, two days after the 12-time Pro Bowl player came out of retirement for a second time to rejoin the Patriots.
Hasselbeck missed five games with a bulging disk in his back and nerve problems down his right leg before returning to play three games. Then Dallas sacked him seven times, and the three-time Pro Bowl passer missed most of the practices before Sunday's game. He was listed as the third quarterback behind Seneca Wallace, who made his fifth start of the season, and Charlie Frye.
Jones had also been listed as questionable, then missed his third game in six seasons. Seattle had just one regular on its offensive line, tackle Sean Locklear.
The Seahawks were also without starting outside linebacker Leroy Hill, who has a neck injury.