A roundup of the week Sept. 8-14

BOXING—DENNIS ANDRIES of England retained the WBC light heavyweight championship with a ninth-round knockout of countryman Tony Sibson, in London.

Hilario Zapata of Panama won a 15-round split decision over Alberto Castro of Colombia to retain the WBA flyweight crown, in Panama City.

Chang Jung-Koo of South Korea retained his WBC light flyweight title with a unanimous 12-round decision over Francisco Montiel of Mexico, in Seoul.

PRO FOOTBALL—When Tony Dorsett, the Dallas All-Pro tailback, sprained his left ankle in the first quarter of the Cowboys' Monday night home opener against the Giants and subsequently spent the second half on the sidelines, Herschel Walker got his NFL baptism unexpectedly early. "When I saw Tony limping out," said Walker, "I said, 'Lord, help me.' " The Giants could have used some help containing Walker. He rushed for 64 yards and scored two touchdowns, including the game-winner with 1:16 left, as Dallas defeated the Giants 31-28. On Sunday a healthy Dorsett raced for 117 yards and a touchdown in Dallas's 31-7 triumph in Detroit, while the Giants bounced back to throttle San Diego 20-7 at the Meadowlands. In the Jets' 20-6 Thursday night loss to New England at the Meadowlands, Freeman McNeil, New York's brilliant but brittle halfback, dislocated his right elbow and will be sidelined for up to six weeks. Atlanta whipped visiting St. Louis 33-13 to begin a season at 2-0 for the first time since 1981. In New Orleans the Saints marched past Green Bay 24-10 by intercepting seven Packer passes. Washington beat the Raiders 10-6 in D.C. despite the heroics of L.A.'s Marcus Allen, who rumbled for 104 yards and extended his NFL record for consecutive 100-yard games to 11. Cleveland rallied to defeat Houston 23-20 in the Astrodome when Browns quarterback Bernie Kosar threw a 55-yard TD pass to Reggie Langhorne with 2:10 to play. In Cincinnati the Bengals nipped Buffalo 36-33 on a 20-yard field goal by Jim Breech 56 seconds into overtime. Jim Kelly completed 13 of 22 for 228 yards for the Bills, who ran up their highest point total in three years. The Rams knocked off San Francisco 16-13 in Anaheim on Mike Lansford's 18-yard field goal with :02 left, and Seattle defeated Kansas City 23-17 in the Kingdome. The Dolphins crushed Indianapolis 30-10 in Miami, while in Tampa, the Vikings beat the Buccaneers 23-10. Chicago got by gritty Philadelphia 13-10 in OT to spoil Eagle coach Buddy Ryan's return to the Windy City (page 30).

GOLF—GENE SAUERS, 24, sank a 15-foot putt for a birdie on the third playoff hole to beat Blaine McCallister and win his first PGA tournament, the Bank of Boston Classic, in Sutton, Mass. Sauers and McCallister had finished regulation play at 10-under-par 274. Sauers earned $81,000 for the victory.

Greg Norman of Australia defeated England's Ken Brown on the first hole of sudden death to win the European Open championship, in Sunningdale, England. He earned the richest payday ever in European golf. Norman, who won the British Open in July, collected a $52,000 first-prize check and a $75,000 bonus for winning both the British and European titles. Norman and Brown ended regulation play tied at 269, 11 under par.

Judy Dickinson shot a final-round 67 for a 72-hole total of 274, 14 under par, to win the LPGA event in Kent, Wash., and the $30,000 winner's check, by four strokes over Hollis Stacy.

HORSE RACING—TURKOMAN ($4.80), ridden by Gary Stevens, won the Marlboro Cup at Belmont with a 1½-length victory over Precisionist. The 4-year-old covered the 1¼ miles in two minutes flat to win the $300,000 winner's purse (page 56).

Danzig connection ($12.60), ridden by Pat Day, won the Pegasus Grade II handicap and the $180,000 first prize at the Meadowlands, by three-quarters of a length over Broad Brush. The 3-year-old's time for the 1‚Öõ miles was 1:49.

QualifY ($13.80), with Gary Stevens in the saddle, won the Del Mar Futurity for 2-year-olds by a nose over Sacahuista. Qualify covered the mile in 1:35[3/5] to pick up the winner's purse of $158,535.

MOTORSPORTS—RICKY RUDD drove a Ford Thunderbird to victory in the Delaware 500, in Dover. He averaged 114.322 miles per hour on the one-mile Dover Downs International Speedway oval to beat Neil Bonnett, who drove a Chevrolet, by 5.08 seconds. Rudd, who earned a first-place check for $51,500, won despite losing a lap to the leaders on Lap 130 for beating the pace car onto the track during a caution period.

TENNIS—STEFFI GRAF defeated Manuela Maleeva 6-4, 6-2 to win the Pan Pacific Open in Tokyo and the $47,000 first prize.

Jimmy Connors beat Aaron Krickstein 4-6, 6-2, 6-0 to take the All-American Championships title and $50,000, on Amelia Island, Fla. ZINA GARRISON won the women's title and $20,000 with a 4-6, 6-1, 6-4 win over Pam Shriver.

Lori McNeil and DAN GOLDIE upset Hana Mandlikova and Kevin Curren 7-5, 6-4 to win the World Couples tournament on Hilton Head Island, S.C., and take home $15,000 apiece.

VOLLEYBALL—China defeated Cuba 15-6, 15-7, 10-15, 15-9 in the finals to retain the world women's championship in Prague (page 28).

MILEPOSTS—FINED: By NFL commissioner Pete Rozelle, 51 members of the CHICAGO BEARS and the ST. LOUIS CARDINALS, a reported total of $29,300 for their parts in a bench-clearing brawl during the Cardinals' 14-7 preseason victory over the Bears on Aug. 23. Cardinals Ottis Anderson, Lionel Washington and Charlie Baker each received the stiffest penalty—$2,300.

FIRED: RAY MILLER, 41, as manager of the Minnesota Twins. In 1½ seasons Miller guided the Twins to a 109-130 record. This year Minnesota was 59-80 under Miller and in last place in the American League West. Twins third base coach Tom Kelly was named interim manager.

NAMED: MARTY FLETCHER, 35, as basketball coach at Southwestern Louisiana, replacing Bobby Paschal, who resigned to become coach at South Florida.

RETIRED: For the second time in four years, EARL WEAVER, 56, as manager of the Baltimore Qrioles, effective at the end of this season. Weaver first retired from baseball following the 1982 season but was lured back by the Orioles midway through 1985, following the dismissal of Joe Altobelli as the club's manager. In 17 years Weaver guided Baltimore to one world championship, four American League pennants and six AL East titles (page 44).

DIED: Florida State University football player PABLO LOPEZ, 21; of a gunshot wound; in Tallahassee. According to police, Lopez, a junior from Miami and a two-year starter at offensive tackle for the Seminoles, was shot at about 1:30 a.m. on Sept. 13, while standing outside Montgomery Gym on the FSU campus. Byron C. Johnson, 20, a Tallahassee resident, was charged with first-degree murder in connection with the shooting.