Picket signs replaced playbooks in the hands of striking NFL players yesterday. Several teams formed picket lines, with the rest scheduled to join the ranks today.

But there were enough dissenters to raise eyebrows in a few cities, including New Orleans, Seattle, Los Angeles and Dallas.

Marc Wilson, the Los Angeles Raiders' $1 million backup, reported to the team in El Segundo, Calif., and said he was advised to do so by his agent, Howard Slusher, because striking could jeopardize his guaranteed contract.

Wilson said he struggled with his decision to cross the picket line. "It was agonizing," he said. "I have terrible feelings about it. I've been up all night. I'm very supportive of the union and their issues . . . {But} I've got to be here, ready and willing to play or risk breaking the contract."

But it is very likely that Wilson will not play alongside replacement players. Slusher said by telephone yesterday that Wilson's contract calls for him "to be ready" to play. But Slusher also said the contract calls for Wilson to have NFL-caliber players with which to perform. "If the club does not provide NFL-caliber players, then the club is in breach of the contract," Slusher said. "Then, Marc will have another decision."

Slusher said he is in full support of the union's position, and has made that position clear to his other clients. "Anything less than unfettered free agency would be a horrible outcome" for the players, he said.

In Dallas, team officials said defensive linemen Randy White and Don Smerek told them they would cross picket lines set up by their teammates.

Several New Orleans Saints became upset when veteran center Steve Korte crossed a picket line to get medical treatment for his injured shoulder. Even though rookie fullback Todd Steele and second-year tackle William Leach also crossed the picket line, it was five-year man Korte who drew the wrath of his striking teammates, about 30 of whom were walking the picket line.

"He's nothing but a scab," cornerback Dave Waymer said. "He's always talking about team unity. What kind of unity does this show. He's a guy always talking about the playoffs and him going to the Pro Bowl. We'll see what happens after this."

Waymer said he is sure Korte will encounter some kind of retribution. "If nothing else, we're the guys who vote on the Pro Bowlers and we'll certainly remember this," he said.

There was a similar reaction to the news in Seattle that Jim Zorn, who quarterbacked the Seahawks from 1976-1984, had made himself available for the games owners plan to stage if the strike continues past next week.

Seattle player representative Kenny Easley said of Zorn, "He obviously is either desperate to play in the NFL or desperate for money. Here's a guy who played in the NFL for a long time and who was adored and was admired by his fans and teammates. Now, he turns his back on us."

Easley also said he "will not stand for" violence against players who cross the line.

Pittsburgh, a strong union city where members of other strong labor unions promised to man the picket lines, is a lot less tolerant. The picket line in Pittsburgh disbanded after about 30 minutes outside Three Rivers Stadium. But Tunch Ilkin, the team's player representative, said, "We're not out here picketing. We're just making sure nobody sneaks in."

But Ilkin also voiced a concern heard from many players yesterday. "It's depressing," he said. "It should never have come to this. I never thought I'd be standing here . . . Obviously, we're very depressed. We want to play football."