Seattle is a top-4 FPI team (+3.6) with elite defensive talent (Leonard Williams #1 DT, Devon Witherspoon #4 CB) facing a Cardinals offense that ranks #1 in scoring but plays pass-heavy (36% run) into a hostile outdoor environment. Arizona's defense is historically bad (#32 in PA) and James Conner (RB) is questionable with a foot injury, which removes their ground-game safety valve in a game where Seattle's run-heavy scheme (51% run) and Leonard Williams' interior dominance should control the line of scrimmage. The FPI model (82% SEA win prob) and the -13.5 spread both reflect Seattle's structural advantage, but the market has priced this fairly tight to the rating differential. Arizona's 1-1 record and #1 scoring rank are real, but they've played two preseason/Hall of Fame games—not NFL regular season—and their defense is genuinely broken. The specific edge: Conner's foot injury + outdoor conditions + Williams' elite run-stopping + Arizona's pass-heavy scheme into a top-4 defense creates a game script where Seattle controls clock and Arizona's #1 scoring rank becomes irrelevant. I make this Seattle -15 to -16; the market's -13.5 is a full point and a half short. PASS on the total (45.5 is reasonable given the matchup control Seattle should exert, but no concrete edge fires). Seattle -13.5 is the only actionable side.