Baseball uniform
Shoulder patches on baseball uniforms were worn usually in honor of something. The first patches to be used on major league uniforms were worn by the Chicago White Sox in 1907. The first patch to be worn on all 16 major league uniform sleeves in one year was in 1939. The second time patches were used in all the professional baseball teams, also with the minor leagues, was done in honor of the grand opening of baseball's Hall of Fame in Cooperstown, New York. The third patch to be worn by all teams, was the rectangular Major League Baseball centennial patch in 1969 in honor of 100 years of professional baseball. Many of the ballpark anniversaries have also inspired special patches to those who have recently died have been using  patches rather than the traditional black arm bands (an item a person wears) of earlier decades.