LOUISVILLE, Ky. - The decision has been made: A Hall of Fame jockey will be aboard Johannesburg in next Saturday's Kentucky Derby.

What wasn't clear Friday night was which Hall of Famer -- Jerrry Bailey or Gary Stevens -- would replace Michael Kinane on the Breeders' Cup Juvenile winner. Kinane will miss the Derby after his suspension for "irresponsible riding" during a recent race at Newmarket was upheld Friday in London by the Jockey Club's Disciplinary Committee.

Currently, Bailey is the listed rider for Castle Gandolfo, Johannesburg's stablemate, but the owners were still "sorting things out," according to Brian Beach, Stevens' agent. Stevens, a three-time Derby winner, already has a contender in Sunday Break, but the colt might not make the field because he hasn't earned enough money.

"If Sunday Break doesn't get in, Gary will ride one of the two," Beach said Friday night. "The owners are still kicking it around."

A maximum field of 20 is expected, and it appears unlikely enough horses will drop out for Sunday Break to gain entry based on graded stakes earnings.

Kinane, who rode the Kentucky-bred Johannesburg in his first eight races, said: "Of course, it's a disappointment, but it wasn't to be." The ban ends May 4, Derby Day.

Bailey, a two-time Derby winner, was expected to move over to Johannesburg, who won the 2-year-old championship. But Stevens has ridden for the Coolmore owners before, having won the 1995 Derby with Thunder Gulch for Michael Tabor, who co-owns Johannesburg with Mrs. John Magnier.

Ron Anderson, Bailey's agent, said: "We haven't heard anything officially. As far as I know Jerry is still on the same horse, and they're looking at Gary for the other one."

Johannesburg, trained by Aidan O'Brien, is one of several Derby mysteries. He won all seven starts as a 2-year-old, but was returned to Ireland to train up to the Derby. He raced only once as a 3-year-old -- finishing second to a 4-year-old filly in the seven-furlong Gladness Stakes at The Curragh in Ireland on April 7.

The loss saw his Derby stock drop, but it could rise quickly with either Hall of Famer climbing aboard. Before the defeat, Johannesburg was considered among the Derby favorites.

Stevens, preparing for his 16th Derby, also won the Derby with Silver Charm in 1997 and Winning Colors in 1988. He rode Point Given to a fifth-place finish in last year's Derby before guiding him to wins in the Preakness and Belmont Stakes.

Bailey, in his 15th Derby, won with Grindstone in 1996 and Sea Hero in 1993.