A Roundup Of The Week Aug. 19-25

BASEBALL—Seoul, South Korea defeated Mexicali, Mexico 7-1 to win the Little League World Series, at Williamsport, Pa. The U.S. team, from Morristown, Term., lost in the semifinals. It was the first time the U.S. was not represented in the title game.

BOWLING—TISH JOHNSON of Downey, Calif. won the LPBT Eastern Open in Rochester, N.Y., defeating Carol Norman of Ardmore, Okla. 185-167.

BOXING—LONNIE SMITH of Denver knocked out WBC super lightweight champion Billy Costello of Kingston, N.Y. in the eighth round of a bout in New York City.

CYCLING—At the world championships in Bassano del Grappa, Italy, KOICHI NAKANO of Japan outsprinted countryman Yoshiyuchi Matsueda to win his ninth consecutive professional sprint title. CONNIE PARASKEVIN of Indianapolis won the only U.S. medal—a silver in the women's match sprint.

EQUESTRIAN—MELANIE SMITH of Litchfield, Conn., riding Calypso, won the U.S. Grand Prix League's U.S. Cup, the world's richest show-jumping competition, in Culpeper, Va. She earned the $50,000 first prize in a jump-off in which she had no faults.

GOLF—ROGER MALTBIE fired a 12-under-par 268 to defeat Denis Watson by four strokes at the World Series of Golf in Akron. Maltbie earned $126,000. Curtis Strange's 32nd-place money of $6,750 boosted his season's earnings to $534,331, a PGA record.

The United States won the 30th Walker Cup matches, edging the team from Britain and Ireland 13-11, at the Pine Valley Golf Club, Clementon, N.J. (page 20).

Pat Bradley sank a six-foot birdie putt on the second hole of sudden-death playoff to win $45,000 and an LPGA event in Denver. Bradley and Amy Alcott were tied at 4-under-par 284 after regulation play.

Steve Termeer of Conroe, Texas shot a 292 for 54 holes, beating John Aber of Greensburg, Pa. by five strokes to win the boys' PGA Junior Championship in Palm Beach Gardens, Fla. In the girls' division, JEAN ZEDLITZ of Pleasanton, Calif. defeated Dana Lofland of Oxnard, Calif. by one stroke with a 12-over-par 300.

HARNESS RACING—CHAIRMANOFTHEBOARD ($5.40), driven by John Campbell, defeated Falcon Seelster by a nose to win the Cane Pace, the second leg of the Triple Crown for 3-year-olds of that gait. The colt covered the mile at Yonkers Raceway in 1:55[1/5] and earned $210,000.