The Seattle Seahawks beat the Kansas City Chiefs 20-3 on Sunday night. Patrick Mahomes was pressured on 17 of 34 dropbacks, Kenneth Walker III ran for 36 yards, and Seattle won 11 of 16 third downs at Lumen Field. Seattle’s Defense Leads 20-3 Victory on Sunday Night The Seattle Seahawks delivered a statement victory over the Kansas City Chiefs on Sunday night, winning 20-3 at Lumen Field.