Justin Houston left the Chiefs' game against Buffalo in the first quarter Sunday because of a knee injury and did not return.
“Houston has a knee sprain on the same knee he had after the Indy game, or during the Indy game,” Chiefs coach Andy Reid said after the Chiefs' 30-22 victory over Buffalo. Reid was referring to the Chiefs’ 45-44 wild-card playoff loss to the Colts in January 2014.
Houston was injured when he appeared to be accidentally leg-whipped by safety Ron Parker.
With Dee Ford out because of a lingering back injury, Frank Zombo entered the game in Houston's place. Zombo, a special-teams ace, entered the game with two tackles and no sacks and finished the game with four tackles.
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Entering the game, Houston led the Chiefs in sacks with 7 1/2.