By Pete Prisco
CBS SportsLine.com Senior Writer
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Top Prospects: Offensive Linemen
Top Five
1. Alex Barron (T), Florida State
The skinny: The best overall lineman in the entire draft. He's a great pass protector, but his run blocking needs improving.
2. Jammal Brown (T), Oklahoma
The skinny: A powerful right tackle who can manhandle an opponent. Some teams think he can move to the left side.
3. Khalif Barnes (T), Washington
The skinny: Here's a player who is moving up a lot of team's boards. Barnes missed time with a wrist injury last season, but he's healthy now.
4. David Baas (G/C), Michigan
The skinny: He played guard at Michigan, but a lot of teams like him as a center. He's a tough, physical player.
5. Chris Spencer (C), Mississippi
The skinny: Here's a guy rising up a lot of boards. He's a power player in the middle who also has good athleticism.
Rising
Spencer. He has an outside chance to go at the end of the first round. He's an athletic center who can be tough in the run game.
Falling
Rob Petiti, Pittsburgh. Once considered a potential fourth-round pick, he'll be lucky to go that high.
Sleeper
Michael Roos, Eastern Washington. He is from Estonia, so he played just one year of high school football. But at 6-5, 300, he is intriguing to a lot of teams.
Overrated
Barron is a little overrated in part because teams are so desperate to get left tackles. He isn't in the same class as former FSU tackle Walter Jones, that's for sure.
Underrated
Ray Willis, T, Florida State. Willis is a going to be a heck of a right tackle. He is powerful and excels at blocking for the run game.
Position assessment
Linemen classes are usually measured by how many premier tackles there are, and this one doesn't have more than three. That's why it's considered a down year for linemen. But the center position is better than in recent years, which helps. Overall, there is depth at a lot of postions. You might not be getting a Jonathan Ogden at tackle, but a Barron and Brown are a notch below that level.