A Roundup of the Week June 6-12

ARENA FOOTBALL—Pittsburgh's Mike Powell intercepted a pass with five seconds remaining and returned it for a touchdown as the Gladiators held off a rally by New England and won 45-39. That victory gave Pittsburgh a 5-2 record and moved it to within 1½ games of the undefeated league leader, Chicago. The Steamrollers' loss left them in last place with a 1-6 mark. Los Angeles was 1-1 for the week; the Cobras beat New York 36-22 and lost to Detroit 39-26 as the Drive's Rich Ingold threw for five TDs.

COLLEGE BASEBALL—STANFORD defeated Arizona State 9-4 to win the College World Series for the second straight year, in Omaha (page 36).

PRO BASKETBALL—Los Angeles took a 2-1 lead over Detroit in the best-of-seven NBA Finals. The Pistons surprised the defending champion Lakers 105-93 at the L.A. Forum in Game 1, but Los Angeles came back with a 108-96 win in Game 2 at home and a 99-86 victory in Game 3 at the Silver-dome (page 18).

BOXING—IRAN BARKLEY knocked out Thomas Hearns in the third round to win the WBC middleweight title, in Las Vegas (page 24). On the same card, VIRGIL HILL retained his WBA light heavyweight crown with a unanimous decision over Ramzi Hassan.

Sumbu Kalambay of Zaire successfully defended his WBA middleweight title with a 12-round decision against Robbie Sims in Ravenna, Italy.

GOLF—SEVE BALLESTEROS birdied the first hole of sudden death to win the Westchester Classic over Ken Green, Greg Norman and David Frost, in Harrison, N.Y. The four were tied at eight-under-par 276 after 72 holes. Ballesteros collected $126,000 for the victory.

Mei-Chi Cheng sank a birdie putt on the second playoff hole to defeat Nancy Lopez and win the Rochester International and $45,000, in Pittsford, N.Y. After 72 holes, Cheng, Lopez and Patty Sheehan were tied at one-under-par 287.

HORSE RACING—RISEN STAR ($6.20), ridden by Eddie Delahoussaye, won the Belmont Stakes by nearly 15 lengths over Kingpost at Belmont Park. The 3-year-old colt ran the 1½ miles in 2:26[2/5] and earned a $303,720 purse, plus a $1 million bonus for having the best record in this year's Triple Crown races (page 34). GOODBYE HALO ($4.40), Jorge Velasquez up, won the Mother Goose, the second jewel in the Triple Crown for fillies, at Belmont by 1¼ lengths over Make Change. The 3-year-old ran the 1‚Äö√Ñ√∂‚àö√±‚àö¬µ miles in 1:49[4/5] to earn $142,320.

INDOOR SOCCER—In the MISL's best-of-seven championship series, SAN DIEGO completed a four-game sweep of Cleveland with a 7-4 victory. The Sockers have now won four of the last six league crowns. In the final game, San Diego led by 3-0 early in the third period when the Force scored three straight goals, two by Craig Allen, to tie the score. After the teams traded goals early in the fourth period, Hugo Perez, the series MVP, kicked in the winner with 3:07 left in the game. The Sockers became the first team to sweep four games in the finals.

MOTOR SPORTS—JAN LAMMERS, JOHNNY DUMFRIES and ANDY WALLACE drove a Jaguar XJR-9 prototype to victory in the Le Mans 24-hour endurance race, beating runners-up Hans Stuck, Klaus Ludwig and Derek Bell, in a Porsche 962, by 2 minutes, 36 seconds. The winners averaged 137.77 mph while covering 3,314.35 miles, the second-longest distance ever attained at Le Mans.

Ayrton Senna of Brazil, driving a McLaren-Honda, finished 5.934 seconds ahead of France's Alain Prost, also in a McLaren-Honda, to win the Canadian Grand Prix, in Montreal. Senna averaged 113.187 mph over the 69 laps of the 2.73-mile, 14-turn course.

ROWING—HARVARD beat Northeastern by 1.09 seconds to win the Intercollegiate Rowing Championship on Harsha Lake in Ohio. In Olympic trials, which were also held at Harsha Lake, ANDY SUDDUTH won a berth by finishing first among the men's single scullers. CATHY TIPPETT and MONICA HAVELKA won the women's double scull (page 62).

TENNIS—BORIS BECKER defeated Stefan Edberg 6-1, 3-6, 6-3 to win a grass court tournament in London and earn $54,400.

Claudia Kohde-Kilsch won a grass court title and $25,500 with a 6-1, 6-2 win over Pam Shriver, in Birmingham, England.

TRACK & FIELD—GALINA CHISTYAKOVA of the Soviet Union broke the women's world record with a long jump of 24'8¼" in Leningrad. The old record of 24'5½" was set by Heike Drechsler of East Germany two years ago and tied by Jackie Joyner-Kersee of the U.S. last summer.

Sergei Bubka of the Soviet Union broke his own year-old pole vault world record by one inch, clearing 19'10¼", in Bratislava, Czechoslovakia.

MILEPOSTS—FIRED: As manager of the Seattle Mariners, DICK WILLIAMS, 59. In his 21 seasons as a major league manager, Williams won four pennants and two World Series. He was 159-192 in his two-plus years with the Mariners, and 23-33 this season. JIMMY SNYDER, 55, the Mariners' first base coach, was named interim manager.

By the Houston Rockets, coach BILL FITCH, 54, who had a five-year mark of 216-194 and led the Rockets to the NBA Finals two seasons ago. He was replaced by DON CHANEY, 42, former coach of the Los Angeles Clippers. By the San Antonio Spurs, coach BOB WEISS, 46, whose record in two seasons was 59-105. The Spurs hired LARRY BROWN, 47, who led Kansas to the 1988 NCAA championship, to succeed him.

As coach of the Chicago Blackhawks, BOB MURDOCH, 41, who had a 30-41-9 record in his only season with the team. He was replaced by MIKE KEENAN, 37, who was fired by the Philadelphia Flyers last month despite a four-year record of 190-102-28 and two appearances in the Stanley Cup finals.

NAMED: As winner of the Hart Memorial Trophy, given annually to the NHL's Most Valuable Player, Pittsburgh Penguins center MARIO LEMIEUX, 22. Edmonton Oilers center Wayne Gretzky, who had won the award for the last eight years, finished third in the balloting.

SUSPENDED: By the USA Amateur Boxing Federation, Olympic coach KEN ADAMS, 47, for allegedly assaulting a federation official last month. The six-month suspension will prevent him from coaching the Olympic team.

TRADED: By the Washington Bullets, center MANUTE BOL, 25, to the Golden State Warriors for center DAVE FEITL, 26, and a second-round draft choice in 1989.

By the San Francisco Giants, outfielder JEFFREY LEONARD, 32, to the Milwaukee Brewers for shortstop ERNEST RILES, 27.