Thursday's Matchup - Seahawks (5-1) at Cardinals (3-3) - NYTimes.com 8:25 p.m. Eastern, NFL Network Line: Seahawks by 6 A good N.F.L. team can win not only when it is firing on all cylinders but also when it comes out flat. On Sunday, Seattle showed just that in a 20-13 victory against Tennessee, which included a muffed field-goal attempt that resulted in a Titans touchdown and sloppy play that led to a couple of fumbles. The Seahawks played down to their competition, and their desultory effort bore all the hallmarks of a team's thinking it could flip a switch at will. Incidentally, the Seahawks appeared to do so against Tennessee at the end of the game. Arizona's young defense becomes tougher the closer it is playing to its goal line, and the not-so-young Karlos Dansby is again making prescient reads at middle linebacker. But the Cardinals are still missing a complement to receiver Larry Fitzgerald who can keep defenses from double-teaming Fitzgerald. Seattle, with the N.F.L."s second-ranked defense in yards per game, will put the loquacious shutdown cornerback Richard Sherman on Fitzgerald and continually roll a safety over the top, which will discourage deep passes. Expect Fitzgerald to use his size more than his speed. Still, if the Seahawks think they can wait until halftime to show up, they would be wise to think again. Pick: Cardinals