This is the 47th Super Bowl, and -- follow closely here -- two teams play in each game, which means there have been 94 Super Bowl slots open over the years. There's parity in the NFL, and that extends to the biggest game: 28 NFL franchises have played in at least one Super Bowl.
But four have never made it.
Everybody will be focused this week and next on Baltimore and San Francisco, but let's take just a minute to play the sad trombone for the Failed Four. We'll look at them in order of accumulated pain, from least to most.