A roundup of the week May 9-15

PRO BASKETBALL—The Milwaukee Bucks staved off elimination from their best-of-seven Eastern Conference final series with the Philadelphia 76ers by defeating the Sixers in Game 4, 100-94. Los Angeles beat San Antonio 129-121 to take a three-games-to-one lead in the Western Conference finals page 28).

BOXING—RAFAEL ORONO retained his WBC super flyweight championship with a unanimous decision over Raul Valdez in Caracas, Venezuela.

PRO FOOTBALL—USFL: Tampa Bay moved into sole possession of first place in the Central Division with a 20-14 victory over Arizona, and Rookie Running Back Gary Anderson, who signed with the Bandits last week, made an auspicious debut. Playing after just four practice sessions, Anderson rushed 18 times for 99 yards, caught four passes for 54 yards and scored on a 12-yard touchdown run. The victory put Tampa Bay a game ahead of Chicago, which dropped a 31-24 decision to Atlantic Division-leading Philadelphia. The Blitz had led 24-10 entering the fourth quarter, but Kelvin Bryant scored on a three-yard run with 12:30 left to make the score 24-17. Another Bryant score, a five-yard sweep, tied matters at 24-24, and then Blitz Quarterback Greg Landry's fumble on Chicago's ensuing possession set up Chuck Fusina's 17-yard scamper for the winning touchdown with 5:46 to play. Birmingham won twice to extend its victory streak to four. On Monday night the Stallions' offense controlled the ball for 43:28, rushed for 242 yards and got a league-record five field goals from Scott Norwood in a 22-7 defeat of New Jersey. Birmingham's defense held Herschel Walker to a season-low 28 yards on 11 carries. Birmingham later crushed Pacific Division-leader Los Angeles 35-20.

GOLF—JIM COLBERT defeated Fuzzy Zoeller on the 6th hole of sudden death to win the $400,000 Colonial National Invitation in Fort Worth. Colbert and Zoeller each completed regulation play at 278, two under par.

By shooting a four-under-par 212 for 54 holes, LENORE MORAOKA won the $150,000 LPGA tournament in Suffolk, Va.

HOCKEY—The New York Islanders took a commanding three-games-to-none lead in their best-of-seven Stanley Cup final series with Edmonton with a 5-1 victory over the Oilers in Uniondale, N.Y. (page 22).

HORSERACING—GATO DEL SOL ($4.20), making his first start since finishing fifth in last year's Travers Stakes, won a $35,000 allowance race at Hollywood Park by 2½ lengths over Ayaan. The 4-year-old, with Eddie Delahoussaye aboard, covered a mile and a sixteenth in 1:41[2/5].

MOTOR SPORTS—BOBBY ALLISON drove a Buick to victory in the $244,235 Mason-Dixon 500, averaging 114.847 miles per hour on the one mile Dover (Del.) Downs International Speedway to beat Darrell Waltrip, in a Chevrolet, by half a car length.

Keke Rosberg, driving a Williams-Cosworth, won the Grand Prix of Monaco in Monte Carlo by 18.47 seconds over Nelson Piquet, in a Brabham-BMW turbo.

SAILING—PHILIPPE JEANTOT, competing in his 56-foot aluminum cutter Crédit Agricole, won the 27,500-mile BOC Challenge solo circumnavigation boat race with an elapsed time of 159 days, two hours and 26 minutes, a world record. The time is 10 days faster than the mark established by Alain Colas of France in 1974.

SOCCER—NASL: The Cosmos won a pair of games to extend their winning streak to three and their lead in the Eastern Division to 11 points over Toronto. With Roberto Cabanas, Vladislav Bogicevic and Giorgio Chinaglia scoring second half goals, the Cosmos beat Seattle 3-0. Chinaglia, the NASL's top scorer, then added three more in the Cosmos' 5-2 victory over Tulsa. Montreal dropped into third place in the East, four points behind Toronto. Le Manic defeated the Roughnecks 4-1, as Elvis Comrie scored a pair of second-half goals, and then edged Team America 1-0. Montreal rookie Goalkeeper Ed Gettemeier turned in a shutout in his NASL debut. Striker Neill Roberts scored a goal and added two assists to lead Toronto past host Tampa Bay 3-1; three days later, the Blizzard beat Seattle 2-1 on David Byrne's goal with 24:01 left to play. Vancouver Midfielder Fran O'Brien made his first two goals of the season count. Goal one gave the Whitecaps a 1-0 victory at Fort Lauderdale, and goal two clinched a 2-1 victory over Tampa Bay. Those wins gave the Western Division-leading Whitecaps a 31-point lead over second place Seattle.

INDOOR SOCCER—MISL: Posting the first back-to-back shutouts in the MISL's five-year history, San Diego defeated Baltimore twice to take a two-games-to-none lead in their best-of-five league championship series. The Sockers won Game 1 6-0 as Julie Veee scored two goals and Goalkeeper Alan Mayer, who two weeks ago was named the league's Most Valuable Player, stopped 22 shots. San Diego then blanked the Blast 7-0 in Game 2 as Veee had a pair of goals and added three assists and Mayer turned away 18 shots. Baltimore had advanced to the championship round by defeating Cleveland 8-6 in the fifth and deciding game of the Eastern Division finals.

TENNIS—YANNICK NOAH defeated José Higueras 3-6, 7-5, 6-2, 6-0 to win the $315,000 German Open in Hamburg.

Pam Shriver defeated Tracy Austin 6-2, 6-2 to win the Gunze Invitational tennis tournament in Tokyo.

TRACK & FIELD—TOM PETRANOFF established a world record in the javelin with a throw of 327'2", breaking the mark set in 1980 by Ferenc Paragi, by 9'10", in Los Angeles (page 78).

Anisoara Cusmir established a world record in the women's long jump with a leap of 23'8" in Bucharest. The mark is a half inch farther than the one set by Vali Ionescu last August.

WATER POLO—At the III FINA Water Polo World Cup, the SOVIET UNION defeated West Germany 6-5 to clinch its fourth consecutive world championship, in Malibu, Calif. (page 86).

MILEPOST—FIRED: As coach of the Chicago Bulls, PAUL WESTHEAD, 44. He guided the Bulls to a 28-54 record and fourth place in the NBA Central Division in 1982-83.