SEATTLE — Russell Wilson threw a 2-yard pass to Ed Dickson with 7:31 left for his third touchdown strike, Chris Carson rushed for two scores, and the Seattle Seahawks clinched an NFC wild-card berth with a 38-31 victory over the Kansas City Chiefs on Sunday night. Wilson got the better of Kansas City’s Patrick Mahomes and helped lead Seattle back to the postseason after missing the playoffs a year ago.