Chris Thorman, my brother and co-editor of the site, used to wear a mustache. So as someone with mustache experience, Chris can probably appreciate the beauty that is John Dorsey's former mustache.
This comes via Wes Hodkiewicsz of the Green Bay Press Gazette:
This picture appears to be taken of Dorsey's time as a player for the Packers in the 1980s. I don't know much else about it besides that stache is awesome.