Lynch was listed as "limited" through Wednesday's practice, but returned to full participation on Thursday. Lynch has rushed for 508 yards and two touchdowns through the Seahawks' first five games.
Unger sat out practices on Wednesday and Thursday with a hip injury, but by Friday was "ready to go," according to head coach Pete Carroll.
Seahawks who are likely to miss Sunday's game are offensive lineman John Moffitt, who has a knee injury, and defensive tackle Jaye Howard, who has a foot injury. Defensive tackle Clinton McDonald (groin) is listed as doubtful as well.
The Patriots will be without linebacker Tracy White, who has a foot injury, and safety Steve Gregory, who has a hip injury. Tom Brady was listed on the injury report on Wednesday with shoulder pain, but now does not appear on the report.