2009
Prior to winning the first 3 games of the 2010 season, that was 2003 when they won their first 9 games and ended the season 13-3.
Prior to the 2007 season, the last time the Raiders beat the Chiefs was December 28, 2002 in Oakland when the Raiders won 28-0.
Prior to Game 13 of the 2009 season, that was Games 1 through 5 of the 2001 season when they lost to the Chargers, Packers, Chiefs, Giants, and Cowboys.
2000
Prior to the time it happened in Weeks 3 (Jaguars) and 5 (Chargers) of the 2007 season, the Broncos last lost consecutive home games in Weeks 8 (Colts), 11 (Chargers), and 13 (Seahawks) of the 2006. season. The last time the Broncos lost home games in consecutive weeks was Weeks 4 (Chiefs) and 5 (Patriots) of the 2000 season.
The last time the Steelers lost four straight regular season games was in 2009. It was from week 10 through 13 they lost to the Bengals, Chiefs, Ravens and Raiders.
Through Week 4 of the 2009 season, that was September 28, 2008 when the Chiefs defeated the Broncos, 33-19.
Through the 2008 season, the last time the Lions won 8+ games in a season was 2000 when they went 9-7.
Prior to the 2009 season when the Steelers lost games 9 through 13 (Bengals, Chiefs, Ravens, Raiders, and Browns), that was 2003 when the Steelers lost games 4 through 8 to the Titans, Browns, Broncos, Rams, and Seahawks. The Steelers wound up with 2003 season with a 6-10 record.
47-43-2- KC Chiefs -Starting the 2005 season
The last season in which the Detroit Lions have won 9 games was the 2000 season.
2006