Danny grew up in the Brownsville section of Brooklyn, NY. Known as "The Wasteland". This is one of the toughest neighborhoods in the area. Having an older brother and living in Brownsville made fights a part of everyday life for him. Danny started boxing when he was 15. As a highly touted amateur boxing prospect, he was an alternate for the USA Olympic Boxing Team for the 2008 Beijing Olympics. During his amateur career, Jacobs won four New York Golden Gloves championships. In 2007, he officially went pro, signing with two of the most influential figures in boxing: Al Haymon (Floyd Mayweather Jr.'s manager) and Oscar De la Hoya's Golden Boy Promotions. in 2011, Danny was diagnosed with a rare and aggressive bone cancer called osteosarcoma. It caused partial paralysis of his legs and damaged nerves in his spine. Doctors didn’t know if he would ever walk again. Danny is the first cancer survivor to win a boxing championship. He is the current WBA Middleweight champion and former NABO and NABF Middleweight champion.