Oakland Athletics First Mascot – Charlie O the Mule New Era 59Fifty Fitted Hat (Green Gold Gray Under Brim) Size:7 7/8 This New Era retro Cap

This New Era retro Cap is from 1924

Chicago Cubs 1908 World 59Fifty New Era Fitted Hat in RealTree Camo

Chicago White Sox 1912 - 1916 New Era 59Fifty Fitted Hat in team color (Navy) and green under brim

Oakland Athletics 1987 All-Star Game New Era 59Fifty Fitted Hat in Walnut with Red Under Brim

Oakland Athletics First Mascot – Charlie O the Mule New Era 59Fifty Fitted Hat (Green Gold Gray Under Brim) Size:7 7/8 This New Era retro CapFirst Mascot Charlie O the Mule Oakland Athletics Oakland Patch New Era 59Fifty Fitted Hat in Green, Gold and Gray Under Brim. Charlie O the Mule was the mascot used by the US baseball teams Kansas City Oakland A's from 1965 to 1976. Charlie O the Mule was purchased from Harold Sloan a small town farmer and muleskinner from Osborn, Missouri. The mule was named after Charles O. Finley, the team's owner at the time.