Federal agents have concluded there is no basis to investigate allegations that five members of the Dallas Cowboys had fixed games in the early 1980s in exchange for cocaine, according to the former chief of the Dallas FBI office.

The allegations against the NFL team were forwarded to the FBI in Dallas by a former agent in Miami who has since pleaded guilty to drug-related charges. The internal FBI inquiry, which began earlier this month, cleared officials for not looking into the drug report when it was received in February 1983.

"It's a non-issue. It's over with," Thomas Kelly, the former Dallas agent in charge, told the Miami News. "The findings were that there was no cover-up by anyone nor any basis for an investigation in the first place," said Kelly, who gave FBI investigators a lengthy sworn statement.

In Dallas, Cowboys President Tex Schramm said that "unfortunately that (Kelly's statement) won't be in headlines across the country. The earlier stories still left the impression that there was grounds for an investigation. That points out the unfairness of that type of story."

The NFL also was looking into the allegations, brought by former agent Dan Mitrione. NFL spokesman Joe Browne said the inquiry was ongoing. Browne said if Kelly is correct that the probe is over, "we're obviously pleased." . . .

Former Seattle Seahawk Jim Zorn, a free agent signed by Green Bay this season, will take Lynn Dickey's place as starting quarterback in Sunday's game against the Chicago Bears, Packers Coach Forrest Gregg said . . .

Veteran running back Wilbert Montgomery, suffering with a two-week-old knee injury, was placed on injured reserve by the Detroit Lions, who replaced him by signing free agent A.J. (Jam) Jones, who was waived by the Los Angeles Rams when Eric Dickerson ended his holdout . . .

Team scout Harry Gilmer has been named by the St. Louis Cardinals as a special assistant to Coach Jim Hanifan, working with quarterbacks . . .

Gene Upshaw, the executive director of the National Football League Players Association, was named vice president and member of the executive council of the AFL-CIO in the labor group's convention in Anaheim, Calif.