2013 Kansas City Chiefs season

The 2013 season was the Kansas City Chiefs' 44th in the National Football League (NFL), their 54th overall and their first under the head coach/general manager tandem of Andy Reid and John Dorsey. After their 26–16 win over the Philadelphia Eagles in Week 3, which was also coach Andy Reid's first visit to Philadelphia since the Eagles fired him the season prior, the Chiefs vastly improved on their 2–14 record from 2012 just three weeks into the season. However, despite starting 9–0, the Chiefs would struggle in the second half of the season, losing 5 out of their last 7 games, and losing control of the AFC West. Despite that, they would still make the playoffs. After defeating the New York Giants 31–7 in Week 4, the Chiefs became the first team in NFL history to win two or fewer games in the previous season, and win the first four games the next.^[2] On October 13, 2013, against the Oakland Raiders, Chiefs fans broke the Guinness World Record for loudest crowd roar at an outdoor stadium^[3] with 137.5 decibels.^[4] Seattle Seahawks fans later reclaimed the record on December 2, 2013, with a roar of 137.6 decibels.^[5] After the Indianapolis Colts defeated the Denver Broncos in Week 7, the Chiefs were the final undefeated team in the NFL. They were the first team in NFL history to earn the number one draft pick and be the last undefeated team in consecutive years.^[6]