Nicknamed "The Dynamite", Dargan is best known for winning the gold medal at the 2007 Pan Am Games in the Men's Light Welterweight.

Dargan began boxing at age seven in 1992 and won the PAL tournament 2005 at 125 lbs, at the National Golden Gloves 2002 on points to Lorenzo Reynolds in the finals and had to settle for 2nd.

In 2007, Dargan was upset by young Javier Molina at the US championships but rebounded to win the Pan American Games in Rio de Janeiro against local Myke Carvalho in the semi and Jonathan Gonzalez of Puerto Rico in the light welterweight final at the Riocentro Sports Complex (9:4).

In October 2014, Dargan married American entertainer Lil' Mo (whose real name is Cynthia Loving).

Since October 2017, Dargan has appeared as a supporting cast member on the reality television show Love & Hip Hop: New York.