 While the Indianapolis Colts and New Orleans Saints had both started the year before 13–0 (with the Colts even going 14–0), on October 10, the Kansas City Chiefs became the last team to lose, losing to the Colts 19–9.It was the first time that no NFL team reached 4–0 since 1970, when the Detroit Lions, Denver Broncos, and Los Angeles Rams started the season 3–0 but all lost in Week 4.The 2010 season featured one International Series game, played at Wembley Stadium in London.