His father has served as his primary trainer since the beginning. He began boxing professionally in 2007, when he was nineteen years old. He won his first professional fight by knocking out his opponent three times. The referee subsequently stopped the bout. He went on to win his first nine fights. He then went on to win the WBC Light Welterweight World Championship, and then became the WBA World Light-Welterweight champion. He is currently undefeated and holds the WBC, WBA (Super), and The Ring Light Welterweight titles. Of his twenty-six wins, sixteen of them were via knockout. In January 2017 Danny earned $2 million when he fought Keith Thurman. He earned a total of $4.5 million combined from his three previous fights. All of these figures are pre-taxes and pre manager fees.
| Net Worth: | $8 Million |
| Date of Birth: | Mar 20, 1988 (34 years old) |
| Gender: | Male |
| Height: | 5 ft 8 in (1.75 m) |
| Nationality: | United States of America |