Dr. Gilbert (Gilly) Ottenberg, 80, a retired Washington urologist and clinical professor of urology who was elected to the Home Plate Sandlot Hall of Fame in 1974, died of cardiac arrest Tuesday at the Washington Hospital Center.

Dr. Ottenberg was a physician here for 48 years before his retirement from private practice in 1977. He was a clinical professor of urology at George Washington University School of Medicine, which cited him in 1971 for 40 years of service on the faculty. He remained affiliated with the university until his death.

He was a founder and past president of the Washington Urological Society, a Diplomate of the American Board of Urology and a member of the American Urology Association.

A third-generation Washingtonian, Dr. Ottenberg earned bachelor's, master's and medical degrees from George Washington University and did postgraduate medical work in Vienna, Austria.

An amateur baseball player, he began playing ball at the age of 15 when he pitched for the Washington Amateur Central League and for Central High School. He pitched for the Young Men's Hebrew Association in the Inter-City League, was a varsity pitcher for George Washington University and, in the 1920s, played with the Jewish Community Center's Rialto Team.

In the 1930s and 1940s, he was physician to the D.C. Boxing Commission.

Dr. Ottenberg received the Selective Service Board's Certificate of Merit in 1946.

He was a founder of the Phi Delta Epsilon Medical Fraternity and a member of the Adas Israel Hebrew Congregation here and the Woodmont Country Club in Rockville. He was a life member of the Jacobi Medical Society and an honorary member of the Urology Department of Doctor's Hospital here.

Survivors include his wife of 57 years, Sadye, of Washington; two daughters, Rhoda Seigel and Regina Levin, both of Chevy Chase; a son, Dr. Raymond Ottenberg, of Rockville, and seven grandchildren.