Nicknamed Alexander the Great, he is a former WBC and IBF Light Welterweight champion.
He grew up in a neighborhood infested with drugs and gangs and was mentored by the likes of NFL player Eric Drain.
He compiled an astounding record of 300-10 as an amateur while training under Kevin Cunningham.
His brother is fellow boxer, Vaughn Alexander.
His first loss as a professional came at the hands of Timothy Bradley in 2011.