BASKETBALL—NBA: PHILADELPHIA (64-12) clinched its second successive Eastern Division title by defeating the Celtics in Boston 115-113 on Hal Greer's 25-foot jump shot with two seconds left in overtime. The 76ers, who won two other games during the week, then lost a return match with the Celtics at home when Player-Coach Bill Russell tossed in a 15-foot basket with two seconds remaining. Runner-up BOSTON (57-19), whose nine-game winning streak was snapped by the 76ers, also lost to the Bulls but took its other two games. In the battle for third place, CINCINNATI (35-42) moved within half a game of NEW YORK (36-42) as the Royals won two of three and the Knicks dropped two. Worse yet for the injury-ridden Knicks was the loss of Dave Stallworth for the rest of the season (he suffered a heart attack). BALTIMORE (19-58) fell deeper into the cellar with three more defeats. In the Western Division SAN FRANCISCO (41-34) gained the title although the Warriors dropped both games they played. Center Nate Thurmond, wearing a cast on his broken hand, returned after missing 13 games but he couldn't stop the Warriors' skid (10 losses in 15 games). ST. LOUIS (36-41) won three of four and held second place by 1� games over LOS ANGELES (35-43), which took three of six. Driving hard for a playoff spot, CHICAGO (30-46) won two of three games and seven of 10 to climb briefly out of last place during the week, but DETROIT (30-46) tied the Bulls by week's end with two victories in four games.
BOATING—GEORGE M. MOFFETT of New York, sailing his 49-foot aluminum sloop Guinevere, gained the SORC championship by half a point over William Snaith in Figaro IV.
BOWLING—NELSON BURTON JR., 24, of St. Louis rolled a 239 in the finals of the PBA $37,000 Greater Buffalo Open for a five-pin victory over Jim Godman, 21, of Hayward, Calif.
BOXING—Twenty-one-year-old Californian JERRY QUARRY, beaten only once in 25 fights, gained a unanimous decision over Britain's veteran Heavyweight Brian London, 32, in a 10-rounder in Los Angeles.
When first-ranked Lightweight ISMAEL LAGUNA of Panama was awarded a 12-round unanimous decision over second-ranked Frankie Narvaez of Puerto Rico, whiskey bottles were thrown from the balcony of New York's Madison Square Garden by angered Narvaez fans. It was the second time in 19 months that a riot followed a Narvaez defeat at the Garden.
Gypsy Joe Harris scored a TKO in the sixth round of a scheduled 10-rounder over Johnny Knight in Philadelphia to earn his 17th straight victory.
CURLING—WASHINGTON easily outscored Nebraska 12-3 in the finals of the U.S. national championships in Winchester, Mass. and, with a 10-1 record, gained the title over Minnesota (9-2), while in the MacDonald's Brier Tankard in Hull, Quebec, ONTARIO won nine straight games for its first Canadian championship since 1939.
GOLF—Two-time U.S. Open winner JULIUS BOROS, 47, took the $115,000 Citrus Open in Orlando. Fla. with a 72-hole total of 274, one stroke ahead of runners-up Arnold Palmer and Canada's George Knudson.
GREYHOUND RACING—Ray Randle's 2-year-old DISCREETLY (9-2) beat Cleve Commel' by 2� lengths to win the $80,000 International Classic in Miami (page 44).
HARNESS RACING—New Zealand-bred pacer CARDIGAN BAY ($3.30), driven by Stanley Dancer, gained a two-length victory over Easy Prom to tie the Windsor (Ont.) Raceway track record of 2:01 in the 1-mile $25,000 Provincial Cup, Canada's richest purse ever. The victory boosted the 11-year-old bay gelding's career earnings lo $752,206.