ARENA FOOTBALL—Los Angeles abruptly ended Chicago's hopes for an undefeated season, as the Cobras' Matt Stevens completed 22 of 39 passes and threw for five TDs in a 48-20 win. L.A., which improved to 5-6 and clinched a playoff spot, scored on every first-half possession in building a 34-6 lead. The Bruisers dropped to 10-1 but remained in first place, two games ahead of Detroit. The Drive clinched second place with its sixth straight win, a 46-10 trouncing of last-place New England. For the fourth consecutive game, Detroit's defense didn't allow a first-half TD. Steve Griffin scored two touchdowns for the Drive, on a five-yard pass reception and a 49-yard kickoff return.
BASKETBALL—At the European Olympic qualifying tournament, in Rotterdam, the SOVIET UNION finished first, and YUGOSLAVIA and SPAIN won the two remaining berths (page 26).
BOWLING—PETE McCORDIC defeated Walter Ray Williams Jr. 236-180 in the final to win a PBA tournament and $23,000, in Tucson.
GOLF—BARRY LANE shot a final-round 68 for a 13-under-par 271 to win the Scottish Open by three strokes over Sandy Lyle and Jose Rivero, at Gleneagles. The victory was worth $74,900.
Tom Sieckmann beat Mark Wiebe on the second hole of sudden-death to win a PGA event and $117,000, in Williamsburg, Va. Sieckmann and Wiebe both ended regulation at 270, 14 under par.
TERRY-JO MYERS shot a 71 in the final round for an eight-under-par total of 276 to defeat Ayako Okamoto and Amy Alcott by one stroke and win an LPGA event, in Indianapolis. Myers earned $60,000 for the victory.
GYMNASTICS—At the U.S. Championships, in Houston, DAN HAYDEN and PHOEBE MILLS won the men's and the women's all-around titles, respectively (page 32).
HARNESS RACING—SOUTHERN NEWTON ($15.40), driven by Berndt Lindstedt, won the Yonkers Trot, the first leg of trotting's triple crown, by 1¾ lengths over Stage Entrance. The 3-year-old covered the mile in 2:00 and earned $86,299.
HORSE RACING—REGAL INTENTION ($3.10), with Jack Lauzon in the saddle, beat Regal Classic by 3¼ lengths to win the Queen's Plate at Woodbine, in Toronto. The 3-year-old Canadian-bred colt covered the 1¼ miles in 2:06[1/5] to get the $199,497 winner's purse.
Pattern Step ($4.40), Chris McCarron up, beat Super Avie by four lengths to win the Hollywood Oaks at Hollywood Park. The 3-year-old filly ran the 1‚Äö√Ñ√∂‚àö√±‚àö¬µ miles in 1:48[3/5] to earn $94,700.
MODERN PENTATHLON—At the U.S. Olympic Trials in San Antonio, ROBERT NIEMAN of San Antonio finished first in shooting, third in riding, fourth in swimming, eighth in running and second in fencing to win with 10,598 points and make the Olympic team for the third time. Joining him in Seoul will be LASZLO BERES, also of San Antonio; MIKE GOSTIGIAN of Newtown Square, Pa.; and ROB STULL of Damascus, Md.
MOTOR SPORTS—AYRTON SENNA, driving a McLaren-Honda, defeated Nigel Mansell, in a Williams-Judd, by 23.3 seconds to win the British Grand Prix, in Silverstone, England. Senna averaged 124.142 mph for 65 laps around the 2.969-mile road course to finish the race in 1:33:16.367.
SAILING—GARY JOBSON of the U.S. won 10 of 11 races and edged Pelle Petterson of Sweden to win his third Liberty Cup title, in New York Harbor. Eight skippers from eight countries sailed Beneteau 31-foot sloops in the match-race regatta.
TENNIS—STEFFI GRAF defeated Manuela Maleeva 6-0, 6-0 to win the women's singles title, and TIM MAYOTTE beat Jimmy Connors 6-4. 3-6, 6-4 in the men's final of a tournament in Osaka, Japan. The winners got $30,000 apiece.
At the U.S. Pro Championships in Chestnut Hill, Mass., TOM MUSTER defeated Lawson Duncan 6-2, 6-2 to earn the title and $50,575.
Wally Masur beat Brad Drewett 6-2, 6-1 to win the Hall of Fame championship and $23,000, in Newport, R.I.
TRACK & FIELD—GABRIELE REINSCH of East Germany set a women's world record in the discus with a throw of 252 feet in Neubrandenburg, East Germany. She surpassed by 7'5" the mark set by Zdenka Silhava of Czechoslovakia in 1984.
Sergei Bubka of the U.S.S.R. broke his own month-old pole-vault world record by a quarter inch when he cleared 19'10½" in Nice, France.
MILEPOSTS—FIRED: University of Minnesota men's athletic director PAUL GIEL, 55, in the wake of allegations of illegal payments to Golden Gopher athletes (page 13).
FOLDED: The CHICAGO STING and the TACOMA STARS of the Major Indoor Soccer League, both of which have suffered severe financial losses. Their demise reduced the number of teams in the MISL to six.
NAMED: As basketball coach at the University of Kansas, ROY WILLIAMS, 37, who had been an assistant coach under Dean Smith at North Carolina since 1977.
As coach of the NHL Minnesota North Stars, PIERRE PAGE, 40, who spent the last three years as an assistant coach with the Calgary Flames.
SIGNED: By the NBA Denver Nuggets, free-agent guard WALTER DAVIS, 33, a six-time All-Star in his 11 seasons with the Phoenix Suns; and by the Suns, free-agent forward TOM CHAMBERS, 29, who played for five years with the Seattle SuperSonics and two with the San Diego Clippers.
TRADED: By the NHL Hartford Whalers, defenseman NEIL SHEEHY, 28, and right wing MIKE MILLAR, 23, to the Washington Capitals for defenseman GRANT JENNINGS, 23, and right wing ED KASTELIC, 24.
By the New York Mets, lefthanded reliever GENE WALTER, 27, to the Seattle Mariners for righthanded reliever EDWIN NUNEZ, 25.
DIED: RAYMOND J. BARBUTI, 83, who won gold medals in the 400 meters and the 4 X 400 relay as a member of the U.S. team at the 1928 Olympic Games; in Pittsfield, Mass. Barbuti, who starred in track and football at Syracuse, also refereed college football games for over 30 years.
Ralph Salvon, 60, the Baltimore Orioles' trainer for the last 23 years; of complications from bypass surgery; in Takoma Park, Md.
Lee Weyer, 51, a National League umpire since 1961, who worked four All-Star games and four World Series; of a heart attack; in San Francisco. Weyer collapsed after playing in a pickup basketball game on July 4 and subsequently died; he had been the first base umpire during a Cubs-Giants game earlier in the day.