MartÃnez's career was launched when he competed in the 1997 National Physique Committee (NPC) New York Metro Championships as a light heavyweight, where he placed first. He continued competing in NPC tournaments until 2001, where he competed in his first IFBB tournament, the Night of Champions, where he placed 8th. The following year, in 2002, he competed in his first Arnold Classic, and placed 13th. He also competed in his first Ironman Pro Invitational the same year, placing 9th. In 2003 he went on to win the Night of Champions.