A roundup of the week April 21-27

PRO BASKETBALL—In the NBA's Western Conference best-of-seven final, Los Angeles took a 3-1 lead over the defending champion SuperSonics with a 98-93 Game 4 win in Seattle. In the Eastern Conference, underdog Philadelphia defeated Boston 105-94 in Game 5 to win that series 4-1 (page 16).

BOWLING—PAT COSTELLO defeated Shinobu Saitch 223-199 to win the $50,000 Women's U.S. Open in Rockford, Ill.

BOXING—ALEXIS ARGUELLO successfully defended his WBC super featherweight title for the eighth time with a fourth-round TKO of Rolando Navarrete, in San Juan, Puerto Rico.

EQUESTRIAN—CONRAD HOMFELD of Petersburg, Va., riding the 15-year-old gelding Balbuco, won the World Cup Grand Prix jumping championship in Baltimore. He finished the 28-rider, three-day event with 47½ points, three more than runner-up Melanie Smith of Germantown, Tenn. (page 44).

GOLF—TOM WATSON shot a 72-hole total of 273, 15 under par, to win his second straight tournament, the $250,000 Greater New Orleans Open, by two strokes over Lee Trevino.

Tommy Bolt and Art Wall Jr. shot a 23-under-par 187 to defeat Sam Snead and Don January by two strokes and win the $400,000 Legends of Golf championship near Austin, Texas (page 67).

Barbara Barrow shot a final-round five-under-par 67 for a 54-hole total of 210 to win the $100,000 LPGA Birmingham Classic by a stroke over Beth Daniel.

HOCKEY—The Philadelphia Flyers, New York Islanders and Minnesota North Stars join the Buffalo Sabres in the semifinal round of the Stanley Cup playoffs. The Flyers defeated the Rangers 3-1 in Game 5 of their best-of-seven quarterfinal to eliminate New York 4-1, after the Rangers had managed to salvage one game in the series, a 4-2 victory in which Ron Duguay scored three goals. The Islanders also dispatched Boston in five games, beating the Bruins 4-2 in the clincher after Boston had defeated them 4-3 in overtime in Game 4. In Montreal, the North Stars beat the Canadiens 3-2 to win its quarterfinal series 4-3 (page 22).

HORSE RACING—ROCKHILL NATIVE ($3), ridden by Johnny Oldham, won the $128,050 Blue Grass Stakes at Keeneland by two lengths over Super Moment. The 3-year-old gelding covered the nine furlongs in 1:50 (page 24).

Jaklin Klugman ($2.80), Darrel McHargue up, won the $20,000 Stepping Stone Purse at Churchill Downs by four lengths over Execution's Reason. The 3-year-old colt was timed in 1:38[3/5] for the mile.

MOTOR SPORTS—DARRELL WALTRIP, averaging 69.049 mph in his Chevrolet, overcame a two-lap penalty for a tire infraction to win the $140,000 Virginia 500 NASCAR race in Martinsville, Va. by nine seconds over Benny Parsons, in a Chevrolet.

SOCCER—NASL: Fort Lauderdale won a pair of games and extended its lead in the American Soccer Conference East to 22 points over Tampa Bay. The Strikers beat California 3-2, with Ray Hudson getting the winning goal at 64:27 on an assist from Teofilo Cubillas. And Hudson, the league's leading scorer (18 points), had the deciding goal in the Strikers' 1-0 win over San Diego. California also dropped a 3-2 decision to Seattle in Anaheim. But Sounder Goalkeeper Jack Brand saw his streak of four consecutive shutouts, one short of the league record, come to an end when the Surfs' Laurie Abrahams scored at 6:23. Despite the loss, California remained first, by six points over San Diego in the ASC West. ASC Central leader Memphis defeated Atlanta 4-3. Paul Child, who had two goals for the Rogues, became the third player in league history to score 200 or more points in his career. The lethargic Cosmos split two games and maintained their lead in the National Conference East. With Giorgio Chinaglia scoring a pair of goals and Mark Liveric and Julio Romero getting one each, the Cosmos were impressive in a 4-2 victory over Tampa Bay in the Meadowlands. But, before 30,822 fans in Tulsa, Billy Caskey scored at 78:28 to lead the Roughnecks to a bruising 2-1 victory over the Cosmos. Fifty-nine penalties—36 of them against Tulsa—were whistled in the match. Winless Rochester lost two shutouts, 2-0 to Tampa Bay and 3-0 to Toronto, running its total of goalless minutes to 270. Philadelphia's and Minnesota's losing streaks reached four. The Fury fell 2-0 to Dallas, while the Kicks, who have yet to play a home game, lost by the same score in Chicago. Washington got two goals from Alan Green and a score and two assists from Joe Horvath to beat Dallas 4-2, but the Tornado clung to its one-point lead over Tulsa in the NSC Central. Portland beat Detroit 2-1 on Dale Mitchell's goal at 69:04, and Los Angeles defeated Vancouver 2-1. Forward Luis Fernando, in his second game with the Aztecs since being acquired from Brazil's America de Rio Preto, scored both L.A. goals.

ASL: California, held scoreless while losing its first two games of the season, recovered to win a pair on the road. The Sunshine, the 1979 Western Division champion, defeated Golden Gate 2-1 on goals by Frank Towers and Pal Renkert. Towers' goal at 53:00 snapped a 233-minute California scoreless stretch. Towers had two more scores, and Andy Chapman and Poli Garcia had one each as California beat defending league champion Sacramento 4-1. Pennsylvania spoiled the debut of the Miami Americans, formerly of New Jersey, winning 1-0 on a goal by Roman Urbanczuk with three minutes left in the second overtime.

TENNIS—BJORN BORG defeated Harold Solomon 6-3, 6-1 to win the $300,000 Grand Prix of Tennis tournament in Las Vegas.

WEIGHTLIFTING—Flyweight ALEKSANDR VORONIN of the Soviet Union established a world record at the European Championship in Belgrade by snatching 248 pounds, one more than the mark held by Wu Shu Teh of the People's Republic of China.

MILEPOSTS—SIGNED: By the Montreal Alouettes of the Canadian Football League, Wide Receiver FRED BILETNIKOFF, 37. In 14 seasons (1965-78) with the Oakland Raiders, Biletnikoff established career team records for receptions (589), total yardage (8,974) and touchdowns (76). He is the fourth leading receiver in National Football League history.

DIED: JOE PAGE, 62, a fastballing lefthanded pitcher who was one of baseball's most famous relief specialists; of heart failure; in Ligonier, Pa. Page had a 57-49 record and 3.53 ERA in eight seasons with the New York Yankees and Pittsburgh Pirates, but it was with the Yankees that Page made his mark. From 1944 to 1950 he appeared in 285 games for New York, won 57 and saved 76 others.