Thomas Cahill was born in New York City, but moved to St. Louis, Missouri in 1871. He was of Irish descent. He attended St. Louis University and built a reputation as one of the pre-eminent amateur athletes in the country. Originally favoring running and baseball, he became interested in soccer after witnessing a game involving a team visiting from Toronto. In 1897, Cahill founded St. Louis Shamrocks which competed in the St. Louis Association Foot Ball League. They won the league title in 1899 and 1900. Although he owned Shamrocks, he also managed several other team including St. Louis Spalding's in 1903-04 and Diel F.C. during the 1904-05 season.
Cahill returned to the East Coast and settled in Newark, New Jersey in 1910. Cahill decided to establish a national governing body for soccer. He was the secretary and one of the founders of the American Amateur Football Association, one of the governing bodies vying for sole status as the nationally recognized governing body. He traveled to Stockholm in 1912 to attend FIFA's ninth annual congress where he applied for the American Amateur Football Association, to become the U.S. national governing body. Cahill's efforts were opposed by a representative from the American Football Association, a rival also attempting to become the nationally recognized body. FIFA did not immediately resolve the dispute, and urged Cahill and the AAFA to work with the AFA to create a solution. Cahill ultimately achieved his goal, however, when the United States Football Association was formed on April 5, 1913, at a meeting at the Astor House hotel in New York. The USFA would later become the United States Soccer Federation. Cahill served three separate terms as the Executive Secretary of the USFA; 1913–1921, 1923–1924 and a final term in 1928. Cahill was the editor of Spalding's annual Official Soccer Football Guide from 1912 to 1924. In 1916 he became the first coach of the United States men's national soccer team, taking a team for a tour of Scandinavia. The United States played its first official international match under the auspices of U.S. Soccer on August 20, 1916, against Sweden in Stockholm, which the U.S. won 3–2, with goals from Dick Spalding, Charles Ellis and Harry Cooper. In 1921 Cahill was instrumental in forming the American Soccer League, which was the first serious attempt to establish a professional league in the United States. He served as the organization's secretary from 1921 to 1926. The American Soccer League was established in 1921 by the merger of teams from the National Association Football League and the Southern New England Soccer League. For several years The ASL's popularity rivaled the popularity of the National Football League. Disputes with the United States Football Association and the onset of the Great Depression in 1929 led to the league's collapse in spring 1933. Cahill's star faded, however. He was passed over for manager of the U.S. national team at the 1928 Olympics and the 1930 World Cup. Cahill died in 1951 in South Orange, New Jersey.
Works
Spalding's Official "Soccer" Football Guide 1914-15, American Sports Publishing
Spalding's Official "Soccer" Football Guide 1915-16, American Sports Publishing
Spalding's Official "Soccer" Football Guide 1916-17, American Sports Publishing
Spalding's Official "Soccer" Football Guide 1917-18, American Sports Publishing
Spalding's Official "Soccer" Football Guide 1918-19, American Sports Publishing
Spalding's Official "Soccer" Football Guide 1921-22, American Sports Publishing
Spalding's Official "Soccer" Football Guide 1922-23, American Sports Publishing