Spendthrift Farm -- Time for a Change (five wins in nine starts, $313,896 earnings) and Eternal Prince (four wins this season as a 3-year-old, including the Wood Memorial and Gotham Stakes; $424,362 career winnings) were retired from racing to enter stud at Spendthrift, Lexington, Ky., in 1986. HARNESS RACING

Little Brown Jug -- Nihilator and Marauder drew the rail positions for their respective elimination heats of Thursday's renewal of the pacing classic at Delaware, Ohio. BASEBALL

American League -- Named Chicago White Sox OF Ron Kittle, .429 with 20 total bases, including three home runs, player of the week ended Sunday. AL President Bobby Brown will conduct a coin toss today to determine sites for one-game playoffs in event of a pennant tie in either division.National League -- Named Los Angeles' Mike Marshall, .417, four homers, 16 runs batted in, player of the week. New York Mets -- Added Sam Perlozzo, onetime George Washington U. athlete who managed Class AA Jackson to the 1985 Texas League pennant and Class A Lynchburg to the 1983 Carolina League title, to major league coaching staff for rest of the year. BASKETBALL

New Jersey Nets -- Added Paul Silas to Dave Wohl's coaching staff. HOCKEY Hartford Whalers -- Signed No. 1 draft choice, 6-foot-3, 210-pound D Dana Murzyn, to a multiyear contract. UMass-Boston -- Named 15-year NHL veteran Gary Doak, 39, a defenseman and later assistant coach of the Boston Bruins, to coach varsity hockey. TENNIS

Slims of Chicago -- U.S. Open champion Hana Mandlikova said this week's event will be her last in America for 1985. COLLEGES

Old Dominion -- Coach Tom Young named as basketball assistants Ron Ganulin, lately of St. Peter's College staff, and Eddie Jordan, NBA veteran out of Rutgers and Carroll (D.C.) High School. American -- Hired Jay Billy, former graduate assistant at Delaware, as wrestling coach, replacing Dave Miller, who resigned last month to enter private business. Purdue -- Declared flanker Rick Brunner (30 pass receptions last year) out for the season, knee surgery.