ECAC Division II -- Named UDC's 6-6 freshman F Tim Stanfil (66 points, 27 rebounds in four games) rookie of week; Named UDC's 6-0 junior C Tracy Walton (44 points, 36 rebounds in two games) to honor roll. Fiesta Bowl -- Elected Dan Mardian. of Phoenix, president for 1986-87. SKIING

Women's World Cup -- In St. Gervais, France, Roswitha Steiner of Austria won third slalom of the season, finishing more than half a second ahead of France's Perrine Pelen and Mateja Svet of Yugoslavia. HOCKEY

Washington Capitals -- RW Ed Kastelic, assigned to Binghamton Jan. 10 after playing 15 games without scoring a point, will decide today whether to continue in pro hockey. New York Islanders -- C Pat LaFontaine will be examined today to discover severity of separated right shoulder suffered Saturday in game against Chicago Black Hawks. NHL -- Named New York Islanders RW Mike Bossy, who became 20th player in league's history to score 1,000 points, player of week. SPEED SKATING

European Championship -- In Oslo, Hein Vergeer of the Netherlands won second straight men's all-round class title, becoming first man in 25 years to defend title. BASKETBALL

Seattle SuperSonics -- Signed F David Pope to 10-day contract.