This Day in Baseball History: June 18, 1972 > Colorful Oakland A's owner Charlie Finley holds baseball's first ever "Mustache Day." Finley agrees to pay $300 to each of his players for growing mustaches by Father's Day. Reggie Jackson had started the trend by reporting to Spring Training with a mustache -- the first Major Leaguer to do so since Wally Schang of the Philadelphia A's in 1914.