Two second-half defensive scores put Kansas City ahead and the Chiefs remained the NFL's only undefeated team with a 23-13 victory at Buffalo. The Chiefs on Sunday improved to 9-0 but only after an early scare by the Bills, who saw rookies Jeff Tuel and Marquis Goodwin combine for a 59-yard touchdown pass in the first quarter to open the scoring. Buffalo led 10-3 and the hosts were poised to stretch their lead in the third quarter before Kansas City's Sean Smith intercepted a Tuel pass and returned it 100 yards for a touchdown that pulled the Bills level at 10-10.
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