Creighton, on a two-year contract, won't have anything near the security just arranged for Vaclav Nedomansky with the Detroit Red Wings. "Big Ned" had become a free agent June 1 but the club rehired him yesterday on a 15-year contract - what, at age 35? Yep, he's assured a front-office job once his playing days are over. The Washington Caps were among several clubs that made overtures for Nedmonasky, who has played both WHA and NHL since captaining the Czech national team that upset the Soviet union in the 1974 world championships (he was named MVP), then defecting to the West in the summer of '74 . . .

The football Colts pay Memorial Stadium in Baltimore the same rent as do the Orioles, based on the baseball team's attendance, and that long-standing contract provision over the years has proven a bargain for the NFL team. But the Bird's big draw this year figures to cost the Colts an additional $120,000 in 1979. No complaint - "I think it's great," said the Colts' assistant general manager, Ernie Accorsi. "All we wanted to do is to be treated equally" . . .

John Harrell, who started at point guard for Duke during its NCAA runnerup 1977-78 basketball season but lost his starting job to Bob Bender last time around, says he will not return for his final year of Blue Devil eligibility although he was passed up in the NBA draft. Harrell graduates this summer but could have played as a postgrad student; never mind, he says, because Coach Bill Foster couldn't guarantee him more playing time . . .

Mike Baker calls to remind that while a lot of other Redskin Park habitues (under contract to E. B. Williams, Barker works out there) are "retiring," he is not - is hot on the trail of a junior-middle weight title shot. Baker kayoed Clarence Gilmore of Memphis in four on the Holmes-Weaver card in Madison Square Garden, and says Williams is angling to match him with Maurice Hope for the world title, in Antigua, in August. If not Antigua, London for U.S.A. . . .