Yost on Mustache Wednesday
Brian asks and Brian receives. Orson comes through and names the great Fielding H. Yost as the greatest mustache of all time (or of today, but still).
http://www.everydayshouldbesaturday.com/2011/5/25/2189657/mustache-wednesday-fielding-yost
That never gets old!
...are pretty entertaining.
But for throwback uniforms, have a twist and have the players grow classic mustaches ... some will struggle, but eh, it would be a unique novelty.