(b Berkeley, Calif., 12 Mar. 1943)
US dancer and company director. He studied at the San Francisco Ballet School and joined San Francisco Ballet in 1959. In 1965 he joined American Ballet Theatre where he remained for three decades, as principal dancer (from 1972) and ballet master (from 1978). In 1997 he was appointed artistic director of Pittsburgh Ballet Theater. Married the former ABT ballerina Marianna Tcherkassky.