Chullo, named in 1998 as Horse of the Year in Argentina before traveling to the United States, where he was winless in three starts in Southern California in 1999 and 2000, has been retired to stud and will stand at Joan Rogers' Applebite Farms in French Camp, Calif. His stud fee is $2,000 live foal, payable Sept. 1.An Argentine son of Equalize (an 11-time stakes winner over five years, including the group I United Nations Handicap in 1988), Chullo won 6-of-8 starts in his native country in 1996 and 1997 as a 2- and 3-year-old, including five in group I competition. Among the group I wins were the Premio Nacional-Argentine Derby (over Lazy Lode by 2 1/2 lengths) and the Premio Carlos Pellegrini (over Quari Bravo, by 4 1/2 lengths).Equalize, bred by Tartan Farms in Florida, is a son of the Northern Dancer stallion Northern Jove, out of the Dr. Fager mare Zonta, also dam of graded stakes winner and sire Maudlin. Chullo was produced from Que Ilusion, a daughter of Cipayo and a full sister to group II winner Brady.Richard Mandella, who trained Chullo in the U.S., said in a statement, "Chullo's credentials and race record are as good as any that have come from South America in recent years. Chullo had great speed that he could extend to the classic distances. He was unquestionably a top-class grade I horse." The statement from Applebite Farms said Chullo suffered an injury to a suspensory ligament in his final South American start that compromised his ability in California. Chullo finished sixth in the Shoemaker Breeders' Cup (gr. IIT) in his American debut in June 1999, then was second in the Arcadia Handicap (gr. IIIT) and fifth in the Inglewood Handicap (gr. IIIT) in the spring of 2000.