Macho Uno, the 2000 champion juvenile colt, has been retired and will stand in 2004 at Frank Stronach's Adena Springs near Ocala, Fla. No stud fee was announced.A 5-year-old horse by Holy Bull out of the Blushing Groom mare Primal Force, Macho Uno was bred and raced for Stronach. He is a half-brother to Breeders' Cup Classic (gr. I) winner Awesome Again (by Deputy Minister).Macho Uno did not run this year, his last start being a fifth-place finish in the 2002 Breeders' Cup Classic (gr. I) won by Volponi. After the Classic, it was discovered the colt had a slight filling behind his knee, which eventually cleared up on its own.He was sent to Adena Springs in Florida and the plan was for him to have a summer and fall campaign this year. He was to be transferred from trainer Joe Orseno to the barn of Bobby Frankel.Macho Uno came to prominence as a 2-year-old when he capped off a three-for-four year with a victory in the Breeders' Cup Juvenile (gr. I). He had won the Grey Breeders' Cup Stakes at Woodbine in his previous start. Sent off the 6-1 fourth choice in the Juvenile, Macho Uno, under Jerry Bailey, won the Juvenile by a nose over Point Given.Macho Uno was plagued by injuries during his career, but he did win the Pennsylvania Derby (gr. III) at three and the Massachusetts Handicap (gr. II) at four. He retires with six wins in 14 starts and earnings of $1,851,803.Macho Uno missed the Triple Crown races. He didn't make his first start at three until July because he was said to be suffering from bone-density immaturity. He won the Pennsylvania Derby in his second race back after his championship season.