President of the U.S. Football Association from 1941 to 1945 and a leader of many Philadelphia soccer organizations.
Sager, who played sandlot soccer before World War I, returned after the war to become an organizer, coach, manager and sponsor of teams and leagues in the Philadelphia area. He served as president of the National Soccer League of Philadelphia from 1932 to 1939, as president of the Eastern Pennsylvania state association from 1934 to 1941 and again from 1943 to 1973, and as a director of the American Soccer League from 1935 to 1942. Before becoming president of the USFA in 1941, he was a vice president of that organization for two years. During his time as a director of the ASL, he managed and sponsored two teams in that league, Passon Phillies and the Philadelphia Nationals.
Sager was a longtime leader of the Philadelphia Old Timers Association and a leader in the move to establish a National Soccer Hall of Fame in 1950.
Inducted in 1968.