"Dangerous" Dana Rosenblatt was a left-handed professional boxer who held a variety of minor boxing titles. Rosenblatt began practicing martial arts at age 13 and earned a black belt in Tang Soo Do when he was 16. He also took up Judo and earned a brown belt. He began competing as an amateur kickboxer at age 15, and won the U.S. amateur middleweight title. Rosenblatt became a professional boxer in 1992, at the age of 20. During his career he beat former U.S. Olympian Howard Davis Jr. and former junior middleweight champion Terry Norris.
In 1993, for Rosenblatt's 15th fight, he wore a pair of trunks with the Star of David symbol sewn into them, harkening back to the legendary Jewish fighters of the 1930s like Benny Leonard and Barney Ross who started the practice. He retired from boxing in August 2003, with a record of 37-1-1 (23). He was notable for being one of the few Jewish boxers active in the 1990s.
Source: Wikipedia, East Side Boxing