A friend posted this fascinating song on his Facebook feed, or whatever it’s called. The YouTube notes say that the song was written by William Jerome and Jean Schwartz and that it was a pro-immigration song.
Billy Murray was an important singer and, according to Wikipedia, quite a baseball fan:
Murray was a devoted baseball fan, and he is said to have played with the New York Highlanders (Yankees) in exhibition games. He also supposedly sometimes called in sick to recording sessions in order to go to the ballpark. Murray recorded “Tessie, You Are the Only, Only, Only”, which became the unofficial theme of the 1903 World Series, when the words were changed from “Tessie, you know I love you madly,” to “Honus, why do you hit so badly?”
Murray is best known for singing “Over There,” the most remembered song from World War I. It was written by George M. Cohan. It’s ironic–Cohan was of Irish extraction and his name sounds Jewish. Here is more on Murray.