Johan Cruyff won't be playing for Ajax Amsterdam, the Dutch champion, or any other soccer club in his homeland during any of the Diplomat offseason.

"Cruyff," the Dutch Soccer Federation declares, "cannot play for any Dutch club either as a pro or as an amateur because he did not apply for a transfer to Holland before July 15." Ajax, with serious injury problems, had made overtures toward its old star now of Washington's NASL entry, and he had indicaticated he might help out. . .

When the North American league assembles its pre-Soccer Bowl '80 banquet Thursday at the Sheraton Washington, striker Roger Davies of the Seattle Sounders will receive the NASL most valuable player award and his teammate, goalkeeper Jack Brand, will be recognized as player of the year. The MVP honor comes via balloting of NASL players, coordinated by The Sporting News; the other, by vote of the Professional Soccer Reporters Association. nDavies scored nine game-winning goals among his total of 25 as he placed third in league point-making. Brand's 15 shutouts broke the NASL record of 12 set in 1970 by Washington's Lincoln Phillips -- now coach at Howard.

The all-star NASL 11 selected by the writers not only shuts out premier midfield operative Cruyff -- while giving Dip defender Bob Iarusci a berth -- it has defender Jeff Durgan and forward Angelo DiBernardo representing the Cosmos -- but not Giorgio Chinaglie! Not a complete player?

Steve Pecher and Tony Abellenger, both of Dallas, join Iarusci and Durgan in the backing line; Tampa Bay's Wes McLead and Perry Van der Beck and New England's Ringo Castillo are deemed better (more popular?) by their peers than Our Johan; Dallas' Njego Pesa, California's Steve Moyers, Davies and DiBernardo leave no room for Chinaglia up front. . .

U. of District of Columbia, which aims to challenge Phillips' Howard Bison and nationally ninth-ranked American U. for local college soccer honors, registered a 3-1 triiumph over Rudgers-Camden on Saturday that somehow didn't make the paper. Let us not let that fate befall the word that UDC Firebird basketball will have a play-by-play radio outlet for 1980-81 season. Station WYCB-AM-1340 will keep up with the Joneses for a nice double play with Harold Bell's often-scoopy "Inside Sports" on 1340 . . .

Moose! The Philadelphia Flyers have looped off yet another Broad Street brawler, and at this rate could be supplanted by crunch-oriented Washington as the hittin'est NHL team this side of Vancouver. Andre Dupont, eight years in Philly going back to the Stanley Cup heyday, has been dealt away to the Quebec Nordiques for futures, and with Bob Kelly and Dennis Ververgaet already become Capitals, you can certainly say the Flyers are not standing pat, under Pat Quinn, with the squad that set the record unbeaten streak last season. They lit out for Maine training camp yesterday after breaking the news to Dupont he woundn't be coming along. At 31, he should have plenty of time to add to his tally of penalty minutes -- the Bulliest of all, upward of 1,800 as a Flyer for a club record. There are just four Flyers left from the Cup pioneers of 1973-74.

Baseball's National League, after giving boosters of the designated hitter a bit of hope with a vote of 5-4-3 this summer, shoved them away by scrapping a scheduled reconsideration session this week at the owners' joint major league meeting in Chicago.

An idea whose time has come: Women's Sports Hall of Fame, and three latter-day standouts will be named today as initial inductees along with pre-1960 immortals Patty Berg, Babe Didrickson Zaharias, Amelia Earhart, Gertrude Ederle, Althea Gibson and Eleanor Holm. Favorites for the honor at a banquet in New York today include B.J. King, Janet Gunthrie, Olga Korbut, Wilma Rudolph, Annemarie Moser-Proell, et al. with a selection committee of 70 media representitives choosing . . .