Married. Diahann Carroll, 39, ice-cool cabaret singer and film star (Claudine); and Robert DeLeon, 24, managing editor of Jet magazine, whom she met during an interview four months ago, a year after the end of her brief marriage to Las Vegas Haberdasher Fredde Glusman; she for the third time, he for the second; in Manhattan.

Separated. Glenda Jackson, 39, acid-etched British movie actress (Women in Love, A Touch of Class); and Roy Hodges, 46, her stage-director husband; after 17 years of marriage, one son. Jackson not only announced her divorce plans but also vowed she would never remarry: "The last four years of our marriage have been horrible."

Died. Steve Prefontaine, 24, fast-finishing long-distance runner; of injuries suffered in a midnight auto smashup; near Eugene, Ore. Holder of every American track record above 2,000 meters, the fiercely independent "Pre" was the leading long-distance contender for the 1976 Olympics and was only beginning to peak as a runner.

Died. Ezzard Charles, 54, hard-luck heavyweight boxing champion from 1949 to 1951; after a seven-year bout with amyotrophic lateral sclerosis, a degenerative muscular disease; in Chicago. A superb tactician, Charles took the heavyweight crown from Jersey Joe Walcott in 1949, but even then he faced an uphill battle for popularity. It became steeper when he ended a comeback try, outpointing the aging Joe Louis in 15 rounds in 1950. Knocked out a year later by Walcott, Charles made several comeback attempts before slipping into obscurity and penury.

Died. Rupert Fothergill, 62, Rhodesian game ranger who headed "Operation Noah," a five-year (1959-63) rescue effort that saved more than 6,000 warthogs, monkeys, snakes, lions, elephants, rhinos and other wild beasts from the rising waters of a man-made lake behind the Kariba Dam on the Zambezi River; of a heart attack; in Salisbury, Rhodesia.

Died. Rufus Rose, 70, puppeteer, whose marionette offspring, Howdy Doody, was one of early television's big stars; of peritonitis; in New London, Conn. Rose joined NBC's Howdy Doody Show in 1947, redesigned its gravel-voiced, freckle-faced principal and colleagues, Dilly-Dally and Phineas T. Bluster, and pulled Howdy's strings through countless squabbles and seltzer battles with Buffalo Bob Smith and Clarabell until 1960, when the network dropped the program and disbanded its vast peanut gallery of young fans.

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