Shades of better Redskin days: Big winner in the fourth race at Laurel yesterday, the filly Play With Pain. Owned and trained by Patrick R. Fischer, and named for the way himself, little No. 37, used to do it in the Redskin defensive backfield, the thoroughbred was a $47-for-$2 score with a jockey named Cooke . . .

Speaking of winners: As the Eagles look to this weekend seeking a first RFK success in five tries for Coach Dick Vermeil, the City of Philadelphia turnaround is complete. Not since Oct. 18, when the Phillies dropped Game 4 of the World Series, has one of the city's professional sports teams lost. The Phils won their final two; the Eagles have a winning streak of six; the NHL Flyers are unbeaten in 11 games since bowing to Toronto, also on Oct. 18; the NBA 76ers have rolled up 11 straight. Even the Major Indoor Soccer League franchise, the Philadelphia Fever, got into the act by winning its opener Saturday night over the San Francisco fog . . .

But a tragic exception: Wendell Bailey, heavyweight boxer who moved from Baltimore to Philadelphia two years ago, stabbed to death with a kitchen knife; his wife charged with murder. A sparring partner for WBC champion Larry Holmes in his training for Muhammad Ali, Bailey, 28, had been kayoed by Philadelphia boxer Jimmy Young a year ago in New York's Madison Square Garden in a shot at making the rankings . . . Garden officials meet Gerry Cooney's managers today, hoping to match the unbeaten heavyweight in late January with Ken Norton (not so) fresh from rallying in the 10th and last round for a split decision over Randy Cobb in Norton's comeback opener . . .

Snakebit: John Stallworth, Super Steeler receiver. First game back from hairline leg fracture, he broke his left foot at Tampa. And Joe Morris, Syracuse's all-time rusher. His third game back from three games out with a shoulder injury, he cracked his collarbone against Navy. He has another year . . .

Back in Philly: Richie Phillips, representing NBA referees, has filed a charge of unfair labor practices against the basketball big league. Phillips alleges a blacklist of men who declined requests to work in event of an officials' strike (averted by a three-year agreement Oct. 9). "Totally untruthful," NBA calls the charge.

Bill Veeck, White Sox, and Gabe Paul, Indians, steam vociferously over a letter from Dave Winfield, the San Diego star going free agent, to their and a dozen other clubs, advising them they would be wasting time to draft him Thursday. Veeck says Chicago wants no part of a Winfield "ego trip" -- while, in a quandary over aborted sale of the club, Veeck renews Manager Tony LaRussa for 1981. Paul says Cleveland will select Winfield anyway.