President of the United States Soccer Football Association from 1969 to 1971.
Single had earlier been vice president and president of the German-American Soccer League of New York and vice president of the of the Southern New York state association. Single, who was born in Germany and came to America as a teenager in 1924, worked for the Journal of Commerce, a New York City business newspaper, and eventually became involved in soccer journalism. He was a partner in the Staats Herald, a New York German-language newspaper, the first editor of the American Soccer League News and a co-founder in 1941 of the Soccer News published for decades by fellow Hall of Famer Milt Miller.
Inducted in 1981.