Now the Cowboys are in trouble. Now we see why the Eagles went to so much trouble to win the NFC East. Philadelphia has exercised its prerogative as home team in the conference championship and will put the blue whammy on Dallas, the team of "luv ya, White" -- Danny, Randy and white jerseys.

The Eagles will forgo their usual home green and wear white Sunday, forcing the 'Pokes into the blue shirts in which they have a mediocre 10-10 record over the 21-year history of the franchise -- and in which their last result was Los Angeles 38, Dallas 14. . .

Dick Coury, received coach under the Eagles' Dick Vermeil, confirms having been interviewed by Steve Rosenbloom, New Orleans general manager, two weeks ago for the Saints' head coaching post and is tabbed as top competition for Bum Phillips if the exiled Oiler truly wants that job. . . Wade Phillips, Bum's son and assistant, was offered the Houston defensive coordinator post opened by the promotion of Ed Biles to head coach, but in light of Wade's guest column in the Houston Chronicle, you can forget that. "If Daddy gets the New Orleans job, all the assistants might wind up over there," he wrote, knocking owner Bud Adams. . .

Great timing, Football Digest announcing yesterday its expert panel's 1980 NFL coach of the year is Buffalo's Chuck Knox and player of year is Cleveland's Brian Sipe. . . UPI's 56-writer panel declares Eagle Ron Jaworski National Conference player of the year in a duel of quarterbacks, 22-15 over runner-up Falcon Steve Bartkowski. . . Continuing saga of a Cleveland hero of yesteryear: now Al Rosen has had heart surgery, a bypass to relieve arterial blockage. Rosen, 56 (although as a Feb. 29 baby he celebrated only his 14th birthday last year), is expected to be okay to pick up soon on his job as Astro general manager. . .

For Andre Gaddy, George Mason U.'s No. 3 all-time scorer, a game and a half did it for his basketball season. Coach Joe Harrington decided yesterday the 6-10 senior out of Brooklyn's sports celebrity factory, Erasmus Hall High, will be redshirted for 1981-82. All because tempers flared in the GMU-Baltimore Loyola game Dec. 1 and he broke a hand. . . Bernard King, older brother of Maryland's Albert, not only has been on best behavior but exemplary on the court as a Golden State Warrier; is NBA player of the week, a three-game span in which he shot .814 from the field, 48 of 59, and had a 50-point night against the 76ers. . . And, onward and upward, the NBA has named as director of broadcasting a 1974 American U. grad and former staffer of the former Washington Dips, Richard Dorfman.