Emmertt Pearson made his vowed not to shave his beard until the Vikings won a Super Bowl in 1975. 38 years later he passed away at the age of 83 never have shaven the beard you see above.
Here is his obituary from Legacy.com.
A longtime member of Vasa Lutheran Church, not only did he sing in the church choir since he was 18, he also helped dig the church basement. Many will remember Emmett for his unforgettable beard, something that he’s had since 1975 when the Vikings lost the Super Bowl to the Steelers. A staunch Vikings fan, the beard was not coming off until the Vikings won a Super Bowl. Needless to say, Emmett died having never shaved his beard. More than the Vikings, farming and education, his family was most important to Emmett and he loved them dearly.
The Vikings came close a few times. A missed FG and underthrown pass to Randy Moss derailed their 1998 15-1 season and Adrian Peterson’s fumbles and a Brett Favre INT derailed their 2010 chances.
May he rest in peace.