The Raiders pared 22 players from their roster Friday night in the final mandatory cutdown. One gets the sense that general manager Reggie McKenzie and coach Dennis Allen aren't finished shaping the roster in advance of the season opener.

As expected, the Raiders kept veteran outside linebacker Aaron Curry on the physically unable to perform list as a result of his sore knees.

Beyond that, there weren't any real surprises.

The Raiders kept cornerback Coye Francies, who was signed Wednesday, and ended up with four recently undrafted free agents making the team -- wide receiver Rod Streater, guard Lucas Nix, defensive tackle Jamie Cumbie (2011) and linebacker Carl Ihenacho (2010).

Curry is ineligible to practice or play in any games for the first six weeks of the season. He can be activated during a 21-day window beyond the first six weeks.

Curry has not practiced for more than two months. Allen was hopeful that Curry's knees would respond to treatments from a specialist in Southern California, but to no avail.

Rookie Miles Burris is slated to begin the season in Curry's place as the starting weakside linebacker.

The Raiders are off Saturday and Sunday. McKenzie and Allen no doubt will spend an inordinate amount of time scouring the waiver wire.

"Whatever moves we feel like give us a chance to be better, we're going to make those moves," Allen said in a conference call about 90 minutes before the Raiders submitted their moves. "We're evaluating any and all positions to see if there's someone out there that can help us."

Based on the way the reserves played Thursday in the exhibition finale, it is likely the Raiders can find a few upgrades from the more than 1,000 players purged from NFL rosters this week.

Few of Oakland's projected starters played beyond the opening offensive and defensive series. Hence, the projected backups and roster hopefuls got plenty of playing time.

Allen wasn't thrilled by much of what he saw, he said.

"That's been a concern, the depth on our roster," Allen said. "It just reconfirmed that we have to upgrade the bottom half of the roster, because depth is a concern."

Linebacker Nathan Stupar is the only member of Oakland's 2012 draft class who didn't make the 53-man roster, though he shined against the Seahawks on Thursday night, Allen said.

"It's been a little bit of an up-and-down deal with Nate," Allen said before cuts were announced, "but he came out (Thursday) and played and acted like he wanted to try to get a spot on this roster."

Apparently, it was a case of too little, too late for Stupar. Now he has to hope he clears waivers and the Raiders decide to sign him to their practice squad.

Teams are permitted to sign as many as eight players to their practice squad once the waiver period ends Saturday.

In other news, Allen said the handful of players who have been injured for more than a week worked out Friday. Therefore, he is hopeful that some or all of them will be healthy enough to play in the season opener Sept. 10 against the San Diego Chargers.

That list includes wide receivers Jacoby Ford and Denarius Moore, center Stefen Wisniewski and defensive tackle Richard Seymour.

For more on the Raiders, visit the Inside the Oakland Raiders blog at ibabuzz.com/oaklandraiders.