A roundup of the sports information of the week

BOXING—ADOLPH PRUITT of Los Angeles, the WBA's second-ranked junior welterweight, walloped Japanese welterweight champion Sorimachi Ryu with a left hook, dropping him for the third time in 1:58 of the second round of a scheduled 10-round nontitle bout in Tokyo.

GOLF—After scrambling and struggling over the front nine, the high-powered team of ARNOLD PALMER and JACK NICKLAUS pulled away down the stretch to score a combined final-round 67, their second sweep of the $200,000 National Four-Ball Championship in Ligonier, Pa. (page 16).

HARNESS RACING—COLUMBIA GEORGE ($4.20) raced the fastest mile in the 150-year history of Ontario harness racing, winning the $27,100 Queen City Pace for 3-year-olds by 2½ lengths over Keystone Pat, with Keystone Aaron third. Roland Beaulieu guided the winner home in 1:57[4/5].

Confusion seemed to be the keynote at the $30,000 Adios Harry Invitation Pace at Wilmington, Del. First RUM CUSTOMER ($4.80), driven by Herve Filion, scored a length victory, covering the mile in 1:57[4/5]. Then Horton Hanover, guided by Joe O'Brien, finished second but was disqualified for interference in the stretch and was placed sixth. Tempered Yankee, who finished fourth, was moved up to second, while Laverne Hanover, the actual third-place finisher, went into a lapped-on-break at the wire and was dropped to fifth. Finally, Chief Crazy Legs, who had finished fifth, came out third in the revised placements.

HOLLERING—H. H. OLIVER, a 61-year-old hog farmer from Goldsboro, N.C., outshouted 28 other vociferous contestants to win the second annual National Hollerin' Contest at Spiveys Corner, N.C., a sporting event based on the old Southern rural custom of neighbors calling to each other from distances of half a mile or more.

HORSE RACING—England's champion jockey, Lester Piggott, took Charles Engelhard's unbeaten 3-year-old NIJINSKY to the lead a furlong and a half from the final post at the $113,295 King George VI and Queen Elizabeth Stakes at Ascot to win his 10th straight race by two lengths for the $75,975 prize. Arthur M. Budgett's Blakeney, winner of the 1969 Epsom Derby, hung on for second, four lengths in front of third-place finisher Crepellana.

Gordon Grayson's VIRGINIA CRACKER ($153.20), ridden by Robert Howard, scored the biggest upset in the history of the Delaware Oaks, reaching the end of the 1‚⅛-mile run for 3-year-old fillies with a 1¾-length margin in 1:49[4/5]. Stephen A. Calder's Office Queen finished second in the $60,800 event, half a length in front of Luminous Lagoon.

MOTOR SPORTS—BOBBY ISAAC of Catawba, N.C., wheeling a 1970 Dodge, weathered 91° heat and a rough track to win the Nashville 420 Grand National stock-car race by two laps over factory teammate Bobby Allison, averaging 87.830 mph over the five-eighths-mile circuit to gain the season's NASCAR point lead.

ROWING—DR. LARRY KLECATSKY of the New York Athletic Club pulled to a two-length victory in the senior 155-pound singles at the 88th annual Royal Canadian Henley Regatta at St. Catharines, Ontario, then came back an hour later to win the association singles against six heavyweight scullers, stroking to a two-length lead in the last 300 meters and crossing the finish line at 30 strokes to the minute in 7:13.2.

SAILING—Winds gusted up to 60 knots, waves boiled to 10 feet, sails and masts snapped and many crewmen were violently seasick in the wildest-ever Chicago-to-Mackinac race across Lake Michigan. Only 79 of 167 boats finished, and when it was all over the new DORA, a 55-footer owned and skippered by Lynn Williams of Elk Grove Village. Ill., was declared winner on a corrected time of 34:39.09 for the 333-mile run, best time for the event since 1912. Teddy Turner's American Eagle, the scratch boat, finished second.

SOCCER—NORTH AMERICAN LEAGUE: Atlanta Chief Coach Vic Rouse switched Right Fullback Henry Largie to center forward for the game against St. Louis and saw his strategy pay off when Largie scored three goals and added two assists in their 6-1 victory. In Washington league-leading Goalkeeper and Coach Lincoln Phillips recorded his 10th shutout of the season as the Darts—who have not lost a home game since 1967—downed the Rochester Lancers 2-0. League-leading scorer Leroy DeLeon booted in both goals unassisted to take a four-point lead in the race for the Goal Getters Cup.

Northern Division: Kansas City (6-7-6), Rochester (5-7-5), St. Louis (3-14-2). Southern Division: Washington (13-3-3), Atlanta (6-8-5), Dallas (6-9-4).

SWIMMING—The Australian team of GREG ROGERS, BILL DEVENISH, GRAHAM WHITE and MIKE WENDEN splashed to a world record in the 800-meter freestyle relay at the British Commonwealth Games in Edinburgh, finishing in 7:50.77 to better the time of 7:52.1 set by the U.S. team in 1964. Canada came in second, England third.

TENNIS—Australian KEN ROSEWALL, down 2-5 in the final set, came back strongly to recover and defeat Cliff Richey 7-9, 9-7, 8-6 at the $25,000 Western Open in Cincinnati. ROSEMARY CASALS, seeded second, overpowered top-seeded Nancy Richey 6-3, 6-3 to take the women's singles title.

Evonne Goolagong of Australia defeated California's Patti Hogan 6-2, 6-2 at the Midland Open in Leicester, England to record her third women's singles title in three weeks, having captured the North of England title at Hoylakeand the Welsh title at Newport.

TRACK & FIELD—The SOVIET UNION trampled the touring U.S. track team 200-173 at the dual meet in Leningrad, beating the men 122-114 and the women 78-59. The competition marked only the second time the Russians have beaten the men in the nine meets between the two countries since 1958 (page 8).

Marilyn Neufville, a 17-year-old London schoolgirl from Jamaica, set the first track and field world record of the British Commonwealth Games in Edinburgh, Scotland, running the 400 meters in 51 seconds flat, clipping .7 of a second off the mark jointly held by France's Nicole Duclos and Colette Besson.

Scotland's IAN STEWART also drew attention at the British Commonwealth Games, upsetting favored Kipchoge Keino of Kenya in the 5,000 meters and setting a European, United Kingdom All-Comers and Commonwealth Games record with a 13:22.8. Ian McCaflerty of Scotland clocked second with 13:23.4, while Keino finished 4.2 seconds behind in third.

MILEPOSTS—NAMED: After much wrangling and two threatened lawsuits, the name of Pittsburgh's entry in the ABA was settled by General Manager Marty Blake, who re-christened the team "Condors," the third nickname since the new owners took over.

SELECTED—To represent the U.S. on a 12-game European tour aimed at developing the nation's 1972 Olympic squad, 12 members of the Olympic Basketball Development Camp at the Air Force Academy (SI, July 20): Centers CYRIL BAPTISTE, Creighton and STEVE ERICKSON, Oregon State; Guards PAUL WESTPHAL, Southern California, LOUIS NELSON, University of Washington, ART WILMORE, U.S. Army and JAMES BROWN, Dartmouth; Forwards TOM McMILLEN and DENNIS WUYCIK, North Carolina, CHUCK TERRY, Long Beach State, BOB NASH, Hawaii, JOBY WRIGHT, Indiana and JULIUS ERVING, Massachusetts.