Facts and figures on Chiefs-Bills matchup

* The Chiefs are 8-0 for the second time in their history (2003 was the other year) after a 23-17 home win over the Browns. Historically, eight teams have won their first eight regular-season games and gone on to win the Super Bowl, the last team being the Saints in 2009.

* The Bills went down to defeat in New Orleans last week, 35-17 to the Saints. Buffalo has scored at least 17 points and allowed at least 20 in all eight games, tied for the third-longest streak to start the season since the merger. The 2000 Rams hold the record since 1970 with 12 straight games of this kind to start their year.

* Including postseason, the Bills have won 10 of their last 11 home games against the Chiefs dating to the merger in 1970, including six straight. Their 35-17 home win over Kansas City on Sept. 16, 2012, is their second-largest margin of victory against any team since the beginning of last season.

* Alex Smith holds a 27-5-1 record as a starter since 2011, best record of any NFL quarterback with a minimum of 20 starts.

* Stevie Johnson leads the Bills in receptions, receiving yards and receiving touchdowns this season. It would be the fourth year in a row and fourth overall for him if it holds up at season’s end. Andre Reed is the only Bills player to lead the team in each of those categories for more than four seasons overall (seven).

* The Chiefs have gone from worst in the NFL last year to first this year in points off turnovers differential. They are at plus-57 in the category to lead the league in 2013. Since 1993, the only team to go from worst to first in this was the Baltimore Ravens from 2007-08.