BOXING—DUANE BOBICK, unbeaten in his last 55 fights, earned the heavyweight berth on the U.S. Olympic team when his opponent was disqualified in trials at West Point. TIM DEMENT knocked out Jesse Trujillo to take the flyweight title. Other winners included DAVID ARMSTRONG, light flyweight; RICCARDO CARRERAS, bantamweight; LOUIS SELF, featherweight; REGINALD JONES, light middleweight; MARVIN JOHNSON, middleweight; RAY SEALES, light welterweight; and JESSE VALDEZ, welterweight.
CHESS—At the world championships in Reykjavik, Iceland, BOBBY FISCHER of the United Slates maintained a two-point (6�-4�) lead over champion Boris Spassky of the U.S.S.R. with a draw, a win and a loss (page 24).
FOOTBALL—The DALLAS COWBOYS escaped with the season's "Texas Championship" by defeating Houston 26-24 on four field goals by Toni Fritsch. Miami played without Bob Griese at quarterback and lost to DETROIT 31-23. WASHINGTON jumped on Baltimore's defense 33-3, and John Riggins' 26-yard run in the last minute of play turned the NEW YORK JETS into 17-10 winners over San Francisco. KANSAS CITY spoiled Abe Gibron's debut as the Chicago Bear coach 24-10, while SAN DIEGO coasted to a 30-7 victory over Atlanta. PITTSBURGH easily defeated the New York Giants 28-10 despite a second-quarter injury to Quarterback Terry Bradshaw. In other games LOS ANGELES upended Cleveland 13-3 (page 67), ST. LOUIS stopped Buffalo 27-10, GREEN BAY defeated Cincinnati 24-14 and OAKLAND came from behind to top New England 31-24.
GOLF—GARY PLAYER of South Africa won his sixth major tournament, the PGA championship in Birmingham, Mich., with a 281, two strokes ahead of Jim Jamieson, who bogeyed the last three holes (page 58).
Kathy Whitworth overtook Jane Blalock as the leading money-winner on the LPGA tour by winning the Knoxville Classic with a 54-hole score of 210, four strokes better than Sandra Haynie. The victory, Miss Whitworth's third of the year, boosted her earnings to $41,737.
HARNESS RACING—Canadian John Hayes' STRIKE OUT ($3.40), driven by Keith Waples, won the final heat in 1:58 to take the $57,000 Thomas P. Gaines Memorial for 3-year-old pacers at Vernon Downs, N.Y.
HORSE RACING—FREETEX ($24.40), Michael Hole up, took the $100,000 Monmouth Invitational at Monmouth Park, N.J. by 1� lengths over King's Bishop. Heavily favored Riva Ridge finished fourth.
Key to the mint ($3.60), a 3-year-old ridden by Braulio Baeza, beat seven older horses in winning the $57,250 Whitney Stakes at Saratoga. Tunex was second two lengths back.
Chou Croute ($6.60), with Robert Kotenko aboard, won her 14th race in 19 career starts, an eight-length victory over Grafitti in the $55,350 Susquehanna Handicap at Philadelphia's Liberty Bell Park.
MOTOR SPORTS—JAMES HYLTON, 38, winner of just one NASCAR race in his eight-year career, drove his Ford across the finish line half a length ahead of Ramo Scott to win the Talladega 500 at the Alabama International Speedway.