An American Soccer League official who was one of the leading administrators in American soccer during the middle decades of the 20th century.
Alonso served as secretary of the Brooklyn Hispano club, one of the ASL top teams, from 1936 to 1956. In the late 1940s, he also become involved in league affairs. He became secretary of the ASL in 1955, and a year later succeeded Erno Schwarz as treasurer and business manager of the league. He served in those three positions until his retirement in 1968, and in 1967 also became the first executive secretary of the league. During his years as an ASL official, he was particularly involved in organizing games between ASL teams and touring foreign teams, and also served on the U.S. Olympic Committee and U.S. Open Cup Committee.
In his younger days, Alonso, who was born in Spain and came to the United States as an infant in 1906, played for a series of amateur teams, both in the United States and in Spain, which he returned to in order to attend school from 1919 to 1924. He was involved with teams in Ohio, Pennsylvania, Washington, D.C. and New York before turning from playing to administration.
Inducted in 1972.