The NFL granted the Raiders a roster exemption for Joseph while Seymour's situation waits to be resolved.
There were reports that the Raiders had sent Seymour a letter demanding he report to Oakland within five days or face a possible suspension, but Cable said he was unaware of any such letter.
"I don't have any knowledge of that right now," Cable said. "I've heard something about that, but I have no knowledge of that right now. It has been nothing more than just trying to get some of these details worked out. That's it."
Trevor Scott, who tied for the Raiders' lead with five sacks as a rookie last season, likely will start at right defensive end Monday night if Seymour doesn't report.
"It's out of my control. Whatever's going to happen is going to happen," Scott said. "So if he does get here, some things are changed or different. I'm not going to let it affect me."
"He's an outstanding football player," Turner said in a conference call Thursday. "A guy who's that good a football player, I think you find a spot, whether it be as an end pass rushing on third down, whatever those things might be. But certainly, it's hard to fit a guy in and get him going in a short period of time."
"He's a pro for one, he knows how to play football and he knows how to turn it on when it's time to turn it on," Tomlinson said. "I think he can absolutely have an effect on the game."
"The day they let me go, they released me, coach Cable said, 'Don't go nowhere,'" Joseph said. "I was just around, sticking around, seeing what was going to happen."
Copyright 2009 by The Associated Press