Rollie Fingers chose to retire from baseball rather than shave off that iconic mustache

Rollie Fingers' Mustache Began as a Joke, Then He Chose It Over Baseball

Rollie Fingers and the 25 Players with the Best Facial Hair in MLB History, News, Scores, Highlights, Stats, and Rumors

Rollie Fingers explains the story behind the mustache - Sports Collectors Digest

The mustache that ended a HOF career

Today in Baseball History: Oakland's Mustache Gang is born - NBC Sports

Rollie Fingers only grew his mustache to get a $300 Bonus from the A's owner. : r/baseball

Rollie Fingers refused to shave his mustache and turned down the Reds

Rollie Fingers refused to shave his mustache and turned down the Reds

Remember Brian Wilson? The Former Giants Closer is Completely Unrecognizable Now - FanBuzz

The mustache that ended a HOF career

The Baseball Mustache: A Tradition With All the Trimmings - WSJ