KANSAS CITY, Mo. — Alex Smith huddled with Chiefs offensive coordinator Matt Nagy in front of his locker, not more than 15 minutes after Kansas City had beaten the New Orleans Saints on Sunday. If they were already dissecting his performance, they weren’t going to find many faults. Smith threw two touchdown passes in another calm, efficient outing, and Daniel Sorensen returned an interception of Drew Brees for another score as the Chiefs held on for a 27-21 victory. “Everybody trusts Alex, man.