The Portland Trail Blazers have offered pro basketball free agent Ralph Sampson of the Houston Rockets a six-year deal that would make him "one of the highest-paid players in the NBA," Trail Blazers President Harry Glickman said.

Sampson spent Thursday with his agent, Gene Perry, considering the offer that would pay him more than $2 million a year.

"My understanding is, and I haven't looked at every contract in the league, that our offer would make him one of the highest-paid players in the league," said Glickman. ". . . But we very well know that signing him is only phase one. We would then have to deal with Houston."

Rockets officials have said they will match any offer to keep Sampson, who plays forward for them but is visualized at center by Portland. . .

A federal judge in Newark, N.J., declined to schedule a quick decision in a players union antitrust suit against the NBA, but said he will rule without a formal trial on the key issues in the bid for unrestrained free agency.

U.S. District Judge Dickinson Debevoise granted the NBA Players Association's motion for summary judgment on the issue of whether the NBA's college draft, salary cap and right of first refusal are exempt from federal antitrust laws.

Debevoise agreed to hear oral arguments Nov. 23 and to rule without a full trial. The union had hoped for a ruling before the season opens in early November . . .

A request for approval of the sale of the Phoenix Suns to a group headed by Suns General Manager Jerry Colangelo is on the agenda for the NBA's annual board of governors meeting Monday in Dallas . . .

The Golden State Warriors have agreed to give Kermit Washington, 36, a tryout if he can gain his release from Portland, which recently said it would give the front-court veteran (1973-82) from American U. a comeback try, then changed its mind. Warriors Purvis Short and Terry Teagle are being left to test the free agent market . . . Detroit matched the New York Knicks' offer sheet for Pistons forward Sidney Green, reportedly a mere $2.325 million over three years . . . First-round draftees newly signed: Golden State, Tellis Frank; Atlanta, Dallas Comegys; Dallas, Steve Alford; New Jersey, Dennis Hopson; Los Angeles Clippers, Ken Norman . . .

Soviet basketball players will compete in their first U.S. pro tournament, against NBA opposition in Milwaukee Oct. 23-25, without 7-foot-4 centers Arvidas Sabonis (bad leg) and Vladimir Tkachenko (high blood pressure).