One of this week’s games stands out among the others as a curiosity.

My efficiency model believes the Washington Redskins have a very slight edge when they host the Kansas City Chiefs. The 9-3 Chiefs are virtual locks to make the playoffs, at least as the top wild card in the A.F.C. On the other hand, the Redskins have suffered through an agonizingly disappointing season, and were recently soundly beaten at home by the underperforming Giants, officially eliminating them from playoff contention.

The Chiefs began the season with an unbeaten streak by using a proven formula: solid defense with just enough low-risk offense to win. They also benefited from an easy schedule and a run against second- and third-string quarterbacks. But their mediocre offensive numbers have caught up with them; they have lost three straight.

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The efficiency model never thought the Chiefs were a dominant contender. At their peak after Week 7, they were ranked seventh over all. Since then, they’ve slipped to 22nd.