Young (knee) was activated from the reserve/PUP list Thursday, John Boyle of the team's official site reports.
Young should suit up and make his season debut against the 49ers on Thursday. The 24-year-old was designated to return Oct. 2 and finally had a chance to practice with the team after being placed on the PUP list as training camp opened. The Mississippi State product should see rotational work on the Seahawks' defensive line moving forward.