A roundup of the week Aug. 27-Sept. 1

BOATING—Winning his second Mallory Cup in four years, JOHN JENNINGS of St. Petersburg, Fla. won the North American Men's Sailing Championship held on St. John's River in Jacksonville. He totaled 51½ points in eight races to edge Clark Thompson of Houston by two points. All eight competitors in the series sailed 17-foot Thistle Class boats.

Mrs. David Larr of Oyster Bay, N.Y. earned her third Adams Trophy and the women's North American sailing title, with 51½ points in the eight-race series off Greenwich. Conn. She beat Kate Wilford, of Oxford, Md. by seven points.

BOXING—In his first defense of the world heavyweight title, GEORGE FOREMAN scored a first-round knockout over Jose (King) Roman in Tokyo (page 16).

PRO FOOTBALL—Miami's 23-game unbeaten streak ended in Bloomington, Minn. as Fred Cox kicked a 25-yard field goal at the final gun to give the Vikings, undefeated so far in preseason, a 20-17 victory. Fran Tarkenton came off the bench late in the third quarter to energize a 17-point Minnesota rally, completing 11 of 14 passes for 166 yards. Los Angeles downed San Diego 30-17 (page 22) and Denver held on for a 16-14 win over Buffalo. Quarterback Dennis Shaw guided the Bills back from a 16-point deficit with fourth-quarter scoring passes to Bob Chandler and Randy Jackson and got them near enough for a field-goal try that might have won. But 46 yards proved too much for John Leypoldt, and the Bills lost their fourth straight. Bronco scoring came on three Jim Turner field goals and a 30-yard pass from Charley Johnson to Haven Moses. The Giants continued undefeated, scoring a 42-21 victory over Philadelphia, for their fifth straight exhibition win. Norm Snead passed for two TDs and ran for a third, all in the first half. Randy Johnson assumed Giant quarterbacking duties thereafter, guiding New York to two more touchdowns and Tackle Larry Jacobson picked off an errant Roman Gabriel pass and went 55 yards for another score.

Detroit's Greg Landry connected with Ron Jessie on an 80-yard TD pass, then threw 48 yards to Jessie to set up Errol Mann's game-winning field goal in the final 12 seconds as the Lions beat Cleveland 16-13. Joe Namath completed half his 16 attempted passes for 285 yards as the Jets downed New Orleans 28-17. Rich Caster caught two long bombs from Namath for TDs, while Saint Quarterback Archie Manning was 11 of 16 for 148 yards. Cincinnati rookie Running Back Charles Clark Capped a 65-yard drive with a 15-yard run as the Bengals defeated Atlanta 31-20. Back Doug Dressler widened Cincinnati's lead with a TD after an interception by Linebacker Jim LeClair. A pair of third-quarter touchdowns and Bob Gresham's 153 yards rushing led Houston to a 20-9 win over Baltimore. Pittsburgh handed Green Bay a 30-22 loss and Chicago dropped St. Louis 31-20. The Dallas Cowboys scalped Kansas City 27-16 and Oakland won the "Bay Battle" with a 23-17 victory over San Francisco.

HARNESS RACING—Driven by Ralph Baldwin, Arden Homestead Stable's gelding FLIRTH won the 48th Hambletonian in straight heats, Du Quoin, Ill. (page 20).

The 9-year-old French mare UNE DE MAI ($3.80), driven by Jean-Rene, won a measure of vindication and the $30,000 Challenge Match at Roosevelt by 2½ lengths over Spartan Hanover.

HORSE RACING—Braulio Baeza rode TRI JET ($6.60) to victory in the $124,720 Hawthorne Gold Cup at Hawthorne Race Course by five lengths over Golden Don.

MOTOR SPORTS—Driving a three-wheeled motorcycle. CRAIG BREEDLOVE set an unofficial world land speed record for the mile in the motorcycle class at the Bonneville Salt Flats in Utah. Averaging 244.814 mph, he covered the distance in 14.075 seconds. Two days later he set a national acceleration record in the quarter-mile when he went from zero to 377.754 mph in 4.765 seconds. His machine went into a series of spins but Breedlove escaped injury.

TENNIS—The early news at the U.S. Open at Forest Hills was the second-round elimination of ILIE NASTASE, the tournament's co-top seed with Stan Smith. Rhodesia's ANDREW PATTISON beat him in a match interrupted because of darkness, 6-7, 2-6, 6-3, 6-4, 6-4. Twelfth-seeded MARTY RIESSEN, No. 2 singles player on the U.S. Davis Cup squad, was also knocked out in the second round, by ONNY PARUN of New Zealand in straight sets. The No. 4 seed ROD LAVER was upset in the third round, losing to India's 19-year-old VIJAY AMRITRAJ, 7-6,2-6, 6-4, 2-6, 6-4. On the women's side, The Netherlands' BETTY STOVE was dropped by JULIE ANTHONY of Los Angeles, Calif. 6-3, 1-6, 6-4. Temperatures of 95-plus caused FRANCOISE DURR of France to default to SALLY GREER of Miami while leading 7-6, 3-4. Durr complained, "I never felt like this in my life." PANCHO GONZALEZ, probably playing in his last year of singles competition, wowed opening-day fans as he took a first set tie-breaker from No. 7 seed TOM OKKER, but the Dutchman bounced back to beat him 6-7, 6-3, 6-1, 6-4.

All in all, it was a nasty week for Nasty as the Association of Tennis Professionals fined Nastase $5,000 and suspended him for one year from member-only tournaments. The disciplinary measure came as a result of Nastase's refusal to join the ATP boycott of Wimbledon this year. Britain's ROGER TAYLOR drew the same penalty and Australian RAY KELDIE was fined $1,000 for the same offense.

TRACK & FIELD—British schoolteacher BRENDAN FOSTER set a world record for the two-mile run with an 8:13.8 in London. He became the first Briton to hold the mark since 1904, bettering the year-old record of Finland's Lasse Viren by .2 second.

East German EVELIN SCHLAAK bettered her own junior world record with a discus throw of 196'10" at the European junior championships in Duisburg.

MILEPOSTS—EXPELLED: By the International Swimming Federation, SOUTH AFRICA and RHODESIA, from the world swimming championships in Belgrade, Yugoslavia. South Africa was barred until it could form "an integrated single governing body" and Rhodesia because it has yet to "provide proof that the sport is integrated" in that country.

FIRED: Detroit Tigers Manager BILLY MARTIN, while on three-day suspension by the league for issuing instructions to his pitchers to throw spitballs during Detroit's 3-0 loss to Cleveland's often-accused spitballer, Gaylord Perry.

FIRED: New Orleans Saints Coach J.D. ROBERTS, 40, who had a 7-25-3 record since mid-1970 and a recent "vote of confidence" from the Saints management. He was replaced by his offensive coordinator, John North, 51.

RETIRED: Middle Linebacker RAY NITSCHKE, 36, defensive anchor of the Green Bay Packers through five championship seasons and two Super Bowl titles. Three times named to All-Pro teams and picked by the Hall of Fame as the outstanding linebacker of the NFL's first 50 years, Nitschke was only the Packers' third-string middle linebacker when he announced, with tears in his eyes, that he was quitting after 15 years in the game.

SUED: By VERA CLEMENTE, widow of baseball star ROBERTO, two aviation firms and the U.S. Government, for $5 million. Her suit charges all parties with negligence, which resulted in the air crash that killed Clemente last Dec. 31.

DIED: Boxing Manager YANCEY (YANK) DURHAM, 52, after suffering a stroke, in Philadelphia. Durham first rose to prominence when he guided Joe Frazier to the 1964 Olympic heavyweight title, and was still the former world heavyweight champion's manager. He had a short career as a boxer himself before World War II, and at his death was also manager of world light-heavyweight titleholder Bob Foster.