The Baltimore Ravens had a historic collapse at the end of the 2021 season, ending the year on a six-game slide that saw them go from being positioned into the number one seed to failing to make the postseason altogether. It was the first losing streak of more than four games under John Harbaugh as head coach over the past 14 seasons.
It was also, by far, the worst run that they had ever had to close out a season, though in 2007, the year Harbaugh came on board, they did lose nine games in a row before beating the Pittsburgh Steelers in the finale, in a game that meant nothing for Pittsburgh.