After almost 20 years of service with The Jockey Club, Hans J. Stahl is retiring as president and chief operating officer at the end of the year. Alan G. Marzelli, who currently serves as the chief financial officer at The Jockey Club, has been named his successor. Marzelli will assume his new duties on Jan. 1, 2003.Stahl joined The Jockey Club as director of operations in February of 1983 and was named executive director one year later. He was named to the newly created position of president and chief operating officer in March 1995.During Stahl's tenure, The Jockey Club made numerous technological advancements, including the creation of an online registry system, DNA parentage verification, and created equineline.com, among many other advancements."The Jockey Club and its family of companies have enjoyed unparalleled growth and diversification under Hans Stahl's leadership over the past 20 years and his dedication to Thoroughbred breeding and racing has enhanced our reputation as an industry leader in many crucial areas," said Ogden Mills Phipps, chairman of The Jockey Club. "On top of that, he leaves behind a talented and experienced management team that is well-suited to carry out our ongoing initiatives in the months and years ahead."Stahl will continue to work with The Jockey Club for the next two years as a consultant.In addition to his work with The Jockey Club, Stahl served on numerous industry committees and task forces through the years and was instrumental in the creation of the National Thoroughbred Racing Association. Most recently, he served as the chairman of a domestic task force for the Racing Medication and Drug Testing Consortium.Marzelli, who is the youngest person ever elected an officer of The Jockey Club, joined in 1983 as controller and assistant treasurer in 1983. He has served in his current position since 1986. In addition to his current duties at The Jockey Club, Marzelli was appointed president and chairman of Equibase, as well as serving as chairman for two of The Jockey Club's subsidiaries: InCompass and The Jockey Club Technology Services."Alan Marzelli has been extremely involved with every one of The Jockey Club entities and numerous other industry organizations over the past 20 years and we're confident that his experience, knowledge and business skills will serve us well in the years ahead," Phipps said.