|Date of birth :
||May 8, 1981
|Place of birth :
|Turned pro :
||Virginia Commonwealth University (1997, Mass Communications)
Romero was born in Tucumán. He won his European Tour card by finishing 14th on the Challenge Tour rankings in 2005.
He had a successful rookie season highlighted by a tied second finish at the Scottish Open and a tied eighth finish in The Open Championship, and finished placed 35th on the Order of Merit. In the 2007 Open Championship, Romero placed third, behind Sergio García and Pádraig Harrington, making ten birdies on the last day of play.
He briefly led the field by two strokes, but made a double bogey on the 17th hole and a bogey on the 18th to miss a play-off by one shot.
The following week he won his first European Tour event at the Deutsche Bank Players Championship of Europe. Romero finished the season in the top ten of the Order of Merit, in seventh position. In July 2006, Romero broke into the top 100 of the Official World Golf Rankings for the first time and he reached a new best of 29th after his Players Championship of Europe win.
The next week a top-10 finish in the WGC-Bridgestone Invitational took him into the top 25. In March 2008, Romero won for the first time on the PGA Tour at the Zurich Classic of New Orleans, and moved to a career high of 21 in the rankings.
In 2008 he overtook fellow Argentine Ángel Cabrera to become the highest ranked South American golfer for a short period until he was surpassed by Camilo Villegas of Colombia. He was named the 2008 PGA Tour Rookie of the Year, having three top-10 finishes including his win in New Orleans.