BOXING—LARRY HOLMES retained his WBC heavyweight title in Las Vegas when Muhammad Ali failed to come out for the 11th round (page 34).
Saoul Mamby successfully defended his WBC super-lightweight championship by scoring a unanimous decision over Termite Watkins in Las Vegas.
Eusebio Pedroza won a split decision from Rocky Lockridge to retain his WBA featherweight title in McAfee, N.J.
PRO FOOTBALL—Defenses provided both excitement and points in the fifth week of play as only Buffalo remained unbeaten. An interception by Bills Linebacker Jim Haslett set up the winning touchdown in Buffalo's 26-24 upset of San Diego, which had entered the game with the league's highest-scoring offense and a perfect record. Detroit, which also had been 4-0, lost 43-28 to Atlanta as the Falcons held Billy Sims to 21 yards on 14 carries and returned two fumbles and a blocked punt for TDs. The victory moved Atlanta into a tie for the NFC West lead with L.A. and San Francisco, who met head on in Anaheim, the Rams winning 48-26. Interceptions carried Pittsburgh to a one-game lead over Houston in the AFC Central, as the Steelers picked off five of Tommy Kramer's passes to beat Minnesota 23-17 and Oiler Quarterback Ken Stabler threw an equal number to the Seahawk secondary in a 26-7 loss to Seattle. A 93-yard interception runback by Denver Linebacker Randy Gradishar gave the Broncos their only TD in a 19-16 victory over Cleveland. Fred Steinfort had four field goals for Denver. In a 23-14 loss to New England on Monday night, the Broncos had been held to 170 yards on offense, their lowest total in 30 regular-season games. With newly re-signed Cornerback Mike Haynes returning a blocked field goal try 65 yards for a touchdown, the Pats won again on Sunday, 21-11 over the Jets, to stay a game behind Buffalo in the AFC East. Dallas and Philadelphia still share the NFC East lead following the Cowboys' 24-3 win over the Giants and the Eagles' 24-14 victory over Washington. Elsewhere, several hours after Green Bay's board of directors gave Coach Bart Starr a vote of confidence, the Packers beat Cincinnati 14-9; Bert Jones victimized the injury-weakened Miami secondary for 282 yards passing as Baltimore defeated the Dolphins 30-17 (page 82); previously winless Kansas City beat Oakland 31-17; and still winless New Orleans lost to St. Louis 40-7.
GOLF—JERILYN BRITZ birdied the second playoff hole to defeat Nancy Lopez Melton and win a rain-shortened $150,000 LPGA tournament in Dallas. Britz and Melton finished the 35 holes tied at 139, one under par.
Mike Sullivan won the $200,000 Southern Open in Columbus, Ga. with an 11-under-par 269, finishing five strokes ahead of Johnnie Miller and Dave Eichelberger.
Kathy Whitworth and DONNA CAPONI YOUNG finished at 195,24 under par, to win the $115,000 LPGA team title in Portland by four strokes over Janet Alex and Judy Clark.
HARNESS RACING—NIATROSS, driven by Clint Galbraith, set a world record for a mile paced on a one-mile track (1:49[1/5]) in a time trial at The Red Mile in Lexington, taking nearly three seconds off Steady Star's 1971 mark (1:52).
Final Score ($4.40, $2.80), Tom Haughton driving, won the $100,000 Kentucky Futurity for 3-year-old trotters by taking the second (1:58) and fourth (2:06[2/5]) one-mile heats, in Lexington.
HORSE RACING—Jacinto Vasquez rode FRENCH COLONIAL ($23.40) to a 1�-length victory over Just A Game II in the $140,500 Man o' War Stakes on the turf course at Belmont, covering the 1? miles in 2:15[2/5].