NFL Game Summary - Kansas City at Buffalo

Orchard Park, NY (SportsNetwork.com) - The Kansas City Chiefs' quest for a perfect season has remained intact. And once again, the team has its defense to thank for it.

Sean Smith came up with a tide-turning 100-yard interception return touchdown of Jeff Tuel in the third quarter, and Tamba Hali took a fumble back 11 yards for a go-ahead score in the fourth as the Chiefs rallied past the banged-up Buffalo Bills, 23-13, at Ralph Wilson Stadium.

Ryan Succop kicked three critical field goals to help Kansas City (9-0) remain unbeaten despite being outgained by a 470-210 margin in total yards. Jamaal Charles added 90 yards on 17 carries in the victory.

Tuel, making his first NFL start with quarterbacks E.J. Manuel and Thad Lewis both out with injuries, hit fellow rookie Marquis Goodwin for a 59-yard touchdown in the opening quarter but struggled thereafter against the fierce Kansas City defense. The undrafted free agent finished with 229 yards on 18- of-39 passing and threw a pair of costly interceptions, none bigger than Smith's pick that tied the game at 10-10 after the Bills were on the verge of building a two-score lead.

C.J. Spiller returned from a sprained ankle to rack up 116 yards on 12 attempts for Buffalo (3-6), with Fred Jackson totaling 77 yards on 16 rushes in the loss.