Marvin L. Warner, principal owner of the Birmingham Stallions, has accused ABC-TV of trying to hurt the U.S. Football League's ratings by refusing to promote its games.

In a telephone interview with the Birmingham Post-Herald Thursday, Warner said he favors adding ABC as a defendant in the league's $1.32 billion antitrust suit against the National Football League. "If this league falters or fails, you can lay it at the doorstep of ABC," he said.

Roone Arledge, president of ABC News and Sports, said, "We regret that Mr. Warner feels so strongly about ABC but the charge is a ridiculous one." . . .

The Dallas Cowboys conducted spot-check urinalyses last season of players they suspected might be using drugs, and all checked out negative, said the team's president, Tex Schramm.

One player, who requested anonymity, told the Dallas Morning News he was tested "almost every week" last season. "Maybe they were hassling me. Maybe they thought they were helping me. But there was no reason to help me, as the tests showed," he said. . . .

The Buffalo Bills, who have the first pick in the upcoming NFL draft, are apparently close to signing defensive tackle Bruce Smith, the Outland Trophy winner from Virginia Tech.