Rau'Shee Warren will become the first US boxer in history to go to three Olympic Games.
He first began in the sport of boxing aged six. He used to go along with his three older brothers when they went to the gym.
His first bout was when he was eight-years-old and he's been involved with the sport since.
At the Athens Games in 2004, Warren lost in the first round to eventual bronze medalist Zou Shiming of China.
The 2012 medal prospect then committed to another four years as an amateur in order to have a second shot at Olympic glory.
At the 2007 World Championships, he won gold and has subsequently won two bronzes.
However, as a 21-year-old, he also lost in the first round of the 2008 Olympic Games in Beijing and will be looking to improve on this as he heads to London.