The Colts 19-9 win over the Chiefs in Week Five allowed the 1972 Dolphins to pop their champagne as they remain the only undefeated team in NFL history.
It also marked the first time since 1970 that no team will start the season 4-0.
The Chiefs entered the game at 3-0 following a bye in Week Four. The other 3-0 teams (Pittsburgh and Chicago) lost in Week Four.
In 1970, Denver, Detroit and the Los Angeles Rams started 3-0 before losing their fourth game.
Three teams (the 49ers, Bills and Panthers) are 0-5 to start the 2010 season. The 49ers are 0-5 for the first time since 1979 and the Bills for the first time since 1985.