All three of the newly finalized games will be broadcast on the home of the Seahawks, Q13 FOX.
The Seahawks will open with a game at the Chargers on Sunday, Aug. 13 at 5 p.m.
Next up, they play host to the Minnesota Vikings at 7 p.m. on Friday, Aug. 18.
The third game is the one that was already announced: A 5 p.m. kickoff on Friday, Aug. 25 against the Kansas City Chiefs at CenturyLink Field.
The Seahawks close out the preseason with a 7 p.m. game at the Oakland Raiders on Thursday, Aug. 31.
The regular season begins Sunday, Sept. 10 at Green Bay.