Dallas Cowboys Coach Tom Landry, saying he wanted to end speculation, announced yesterday he would not retire after the 1984 season.

Landry, 60, second only to George Halas in NFL victories, is nearing the end of his 25th season. The team never has had another coach.

"I thought it was probably time to lay to rest talk of my retirement," he said during a radio broadcast. "I'll be back next year."

Cowboys President and General Manager Tex Schramm said Landry had agreed to the basic terms of a three-year contract to begin in 1985, but that it had not yet been signed. According to the Dallas Times-Herald, Landry will be paid about $800,000 a season, the same as Miami Coach Don Shula. . . .

Saying "they can color me gone," New Orleans Saints owner John Mecom confirmed he is trying to sell the team for $75 million. Mecom said he had been talking with four parties, and two were very serious.

"I only stayed this year because the coach (Bum Phillips) said this was going to be our season," said Mecom, who has owned the Saints since their inception Dec. 16, 1966. The Saints are 6-7. "This was the year of all the promises and guarantees. I'm tired and discouraged."

Phillips refused to speculate how a change of owners might affect the team . . .

Coach Kay Stephenson has already made a decision on the future of Joe Ferguson. He will be replaced as starting quarterback for the 1-12 Buffalo Bills by Joe Dufek -- at least in Sunday's game against Indianapolis. But the decision on Stephenson's future, which has included speculation about his possible successor, will not be made until the end of the season, according to team owner Ralph C. Wilson Jr. . .

Maryland was among 14 schools selected by the U.S. Football League to increase each team's list of territorial-protected schools to six. Each USFL team may protect 25 players from its territorial schools. Maryland becomes one of Tampa Bay's territorial teams.

Other schools selected were South Carolina, Boston College, Oklahoma, Washington, UCLA, Oklahoma State, SMU, Clemson, Iowa, Nevada-Las Vegas, Pittsburgh, West Virginia and Wisconsin . . .

Indianapolis Colts running back Curtis Dickey has been charged with battery after allegedly beating his estranged wife.