A roundup of the week July 23-29

GOLF—PETER JACOBSEN shot a 15-under-par 269 to defeat Mark O'Meara by two strokes at the $400,000 Greater Hartford Open in Cromwell, Conn.

Juli Inkster shot a final-round five-under-par 67 to win the $330,000 du Maurier Classic in Toronto by one stroke over Ayako Okamoto. Inkster, who finished the 72 holes at nine under, became the first rookie in LPGA history to win two tour events.

HORSE RACING—JOHN HENRY ($4.40), with Chris McCarron up, ran the 1½-mile turf course at Hollywood Park in 2:24[4/5] to win the $219,800 Sunset Handicap. The 9-year-old gelding beat Load the Cannons by a length.

Big Pistol ($3.40), ridden by Garth Patterson, edged Birdie's Legend by a neck to win the 1‚⅛-mile, $200,000 Haskell Invitational in Oceanport, N.J. The 3-year-old colt covered the distance in 1:47[4/5].

Teenoso (13-2), Lester Piggott up, won the $300,000 King George VI and Queen Elizabeth Diamond Stakes in Ascot, England by 2½ lengths over Sadler's Wells. The 4-year-old colt ran the 1½ miles in 2:27.95.

MOTOR SPORTS—DALE EARNHARDT, in a Chevrolet, came from behind on the final lap to beat Buddy Baker, in a Ford, by 1.66 seconds in the $415,725 Talladega 500. Earnhardt averaged 155.585 mph on the 2.67-mile tri-oval course at the Alabama International Motor Speedway in winning this NASCAR race for the second straight year.

XXIII OLYMPIC GAMES—SWIMMING: MICHAEL GROSS of West Germany won the men's 200-meter freestyle in 1:47.44, a world record. STEVE LUNDQUIST of the U.S. won the gold medal in the 100-meter breaststroke with a world record time of 1:01.65 (page 34).

POWERBOATING—CHIP HANAUER, in Atlas Van Lines, averaged 130.866 mph for the six laps around the 2½-mile Columbia River course in Tri-Cities, Wash. to win his third straight APBA Gold Cup for unlimited hydroplanes. In an earlier heat Hanauer set a national record for a single-lap average with a speed of 137.762.

SOCCER—NASL: Defending champion Tulsa sent a message to the competition that it's making a comeback. Mired in fourth in the Western Division most of the season, the Roughnecks won twice, 3-1 at Golden Bay and 4-1 over Minnesota. With a three-game streak going, they're in position to make a strong second-half charge, which is what they did last season. Forward Ron Futcher scored five goals in the two wins to take second in the league scoring race, four points behind the 37 of Golden Bay's Steve Zungul. In the East the Cosmos moved to within two points of idle first-place Chicago with a 3-1 win over San Diego, despite the absence of seven players who were practicing for the Olympics.

TENNIS—AARON KRICKSTEIN defeated Jose-Luis Clerc 7-6, 3-6, 6-4 in Brookline, Mass. to become, at 16, the youngest player ever to win the U.S. Pro Tennis Championship.

TRACK & FIELD—The team of LILLIE LEATHERWOOD, SHERRI HOWARD, VALERIE BRISCO-HOOKS and CHANDRA CHEESEBOROUGH set an American record in the 4 X 400-meter relay with a time of 3:19.60 at a meet in Walnut, Calif. They clipped 3.21 seconds off the mark set by the U.S. silver medal team at the '76 Olympics in Montreal.

MILEPOSTS—ANNOUNCED: By the NCAA, the option of a one-year moratorium on TV sanctions for college football programs on probation. If a district court confirms the NCAA's power to impose such punishment, the bans lifted this year will be restored in 1985.

DROPPED: From his position as an alternate on the U.S. Olympic Weightlifting Team, JEFF MICHELS, 22, who was attempting to have the International Olympic Committee overturn his suspension from competition. That ban was imposed by the International Weightlifting Federation and the USOC after Michels failed a drug test at the '83 Pan American Games, and the IOC declined to lift it.

NAMED: As head coach of the Cleveland Cavaliers, GEORGE KARL, 33, replacing Tom Nissalke, who was fired in May. Karl is Cleveland's eighth coach in the past six years.

PLACED ON PROBATION: By the NCAA, for two years, the UNIVERSITY OF ILLINOIS football team, for recruiting violations. The NCAA sanctions make the Illini ineligible for this season's Rose Bowl and, pending a decision on the moratorium (see above), for any live TV games for a year.

REVERSED: By a three-member panel of the American Arbitration Association, an earlier arbitrator's reinstatement of RUSS SILVESTRI, 22, to the U.S. Olympic Yachting Team. JOHN BERTRAND, 28, will be the U.S. representative in the Finn class.

SUSPENDED: By commissioner Bowie Kuhn for the rest of the '84 baseball season, pitcher VIDA BLUE, 36, who was released by Kansas City last summer. Blue was convicted of cocaine possession last October.

TRADED: By Cincinnati, first baseman DAN DRIESSEN, 34, to Montreal for pitcher ANDY McGAFFIGAN, 27, and a minor-leaguer.

WITHDREW: From the Olympics, LIBYA, which became the 19th nation to pull out of the Games.

DIED: BRYAN HEXTALL, 70, a three-time NHL first-team all-star and a member of the Hockey Hall of Fame; of a heart attack; in Portage la Prairie, Manitoba. Hextall scored the deciding overtime goal against Toronto in 1940 to give the Rangers their last Stanley Cup.