Danny Mijovic posted a 5-under-par 67 at Palma Real Golf Club. He is joined in fourth place by Clodomiro Carranza, Clint Jensen and Mauricio Molina.
Curry, a tour rookie, earned his playing privileges last fall.
Derek Gillespie, the defending champion, and Brad Sutterfield, the tour's money leader, share eighth place at 4-under-par 68. They are joined there by Jason Allred, Will Moore and Bjorn Widerstedt.
Danny Paniccia, Paul Devenport and Brennan Webb head a group of 10 players at 3-under-par 69. Also in that group are Aurelio Macias, Antonio Maldonado, Craig Matheson, Dean North, Michael Sims, Jon Turcott and Matt Weibring.