The Raiders' Barret Robbins, who was removed from the Super Bowl lineup Sunday after missing all of the team's game preparations the day before, was believed to have stopped taking his prescription medication for depression "some time ago," a source close to the Oakland center told the San Francisco Chronicle.

	Robbins

An unnamed member of Robbins' family, quoted in Tuesday's editions of The New York Daily News, said the 6-foot-3, 320-pound Robbins was under a suicide watch in San Diego.

"We are very worried about Barret. That's all I can say right now," the family member was quoted as saying. Drew Pittman, Robbins' Dallas-based agent, said Monday he expected Robbins to be released from the hospital Tuesday morning.

Meanwhile, the Raiders called a news conference for coach Bill Callahan for noon Wednesday. Callahan has said he would discuss the Robbins' situation once the team returned home from San Diego.

"We're really handling this as a personal issue for Barret,'' Raiders senior assistant Bruce Allen said Tuesday. "We're involved in his situation, but there is privacy involved.''

Allen said he had spoken to Robbins recently, and talked more than once with the center's wife Tuesday. Allen declined to offer specifics.

Report: Teammates' past partying too much for Gannon to take

Raiders quarterback Rich Gannon refused to play in a preseason game two years ago because he overheard offensive linemen talking about how much they had partied the previous night, the Los Angeles Times reported Tuesday. Gannon was supposed to play at least a half in the Raiders-Cowboys preseason game in Mexico City on "Monday Night Football." Gannon never even put on a uniform, and the Raiders said he'd come down with a stomach bug and was too ill to play, the Times said. The truth was, he refused to play, according to the Times' story. Gannon walked into the locker room a few hours before the game and overheard some teammates talking about their previous night's partying. "I'm just going to block the guy in front of me," one player said. "I hope they don't expect me to get downfield and block anybody." Gannon went to then-coach Jon Gruden and erupted, the Times reported, telling Gruden he had better get control of his team. That's when Gannon announced he wouldn't be playing. -- ESPN.com news services

On Monday, a source close to Robbins told ESPN that he is suffering from disorientation and complaining that he doesn't know where he is. The San Jose Mercury News reported the diagnosis of Robbins' condition could take another five to seven days.

If further tests do not show evidence of drug use, doctors are likely to examine the history of depression that Robbins has discussed publicly in the past. Pittman told the Chronicle that "nobody really knows where he was on Saturday because he hasn't told anybody. He hasn't told me where he was."

Pittman, while acknowledging he had not spoken to Robbins on Sunday, challenged reports of teammates saying Robbins had been drinking Saturday in nearby Tijuana, Mexico.

"Anybody that places him in Tijuana but doesn't have an eyewitness account is speculating," Pittman said.

Before Robbins' story became public Sunday morning, the Raiders received a phone call from someone who said he had recovered Robbins' wallet, the Mercury News reported. Two Raiders fans and a bar worker said Robbins was at Moon Doggy's, a bar in Pacific Beach, early Saturday night, the Contra Costa Times reported, adding they noticed Robbins sitting in a booth by himself in the back of the bar. Robbins was crying at one point, according to the report. The two fans heard him muttering to himself and engaged him in conversation.

"He was more upset than anything else," one of the fans said. "He just looked lost. We thought, 'What's he doing by himself?' "

Robbins acknowledged one of the fans who asked if he was going through family problems.

"We said, 'Hey, we got to get you home. We want you to play good tomorrow,' " one of the fans said. "We gave the cab driver 20 bucks and told him to take him back to the Hyatt."

A team source said Robbins was suffering from alcohol poisoning after drinking too much that day. Several players said Robbins spent a large part of the day in Tijuana.

Raiders guard Frank Middleton, who was openly angry that extracurricular activity might have prevented Robbins from playing, said Sunday night, "A lot of players were out partying this week -- I mean, it's the Super Bowl and you've got to enjoy the moment.

"But the rest of us were in by the 2 a.m. curfew. You can have fun, but you've got to take care of your business. We've been saying all year we had problems to deal with on our offensive line, and now you know," Middleton said. "Barret is gonna do what he's gonna do. But when it affects your teammates, that hurts, man."

Robbins, an All-Pro selection for the first time this season, will not play in the Pro Bowl on Sunday in Honolulu. The Raiders lost to Tampa Bay 48-21 on Sunday, the Buccaneers' first championship.

Information from The Associated Press was used in this report.