The Green Bay Packers have started 4-0 three times in the past decade and a half. None of those hot starts resulted in Super Bowl appearances, however, for a multitude of different reasons.
Twice, the Packers ran into a hot New York Giants team in the postseason after starting the regular season with a bang. 2007 and 2011 ended with very different feels — overtime of the NFC Championship in one case, a disappointing performance as the NFC’s top seed in the other — but both of those teams largely maintained their early successes through the remainder of the regular season.