Question

This boxing champion became a symbol of Jewish pride as he won the lightweight title in 1917 wearing trunks with the Star of David. In one bout, while pounding "Irish" Eddie Finnegan, Finnegan clinched and whispered in his ear in Yiddish to take it easy because he was really Seymour Rosenbaum.

Answer 1

The boxer the question is referring to is Benny Leonard. Benny Leonard was born in the jewish ghetto of Lower East Manhattan, and became a boxer at age 15. He won the world lightweight titel in 1917. He won it against welsh boxer Freddie Welsh in Philadelphia.