Kalil's name belongs with Calvin Johnson, LaRon Landry, and Patrick Willis as one of the true sure things of this draft class. He should join Nick Mangold as a rare first round center, and he's a better overall prospect than Mangold. Kalil may not pave interstate highways, but he's an ideal zone blocking center. The way he uses his hands, his understanding of angles, his mobility, his smarts, his field vision - all are top notch. His dad, Frank, was a center drafted by the Bills in 1982, and Ryan will surely do the family name proud. Kalil should be the first interior offensive lineman drafted.

Not many guys top the both the 225 rep list and the wonderlic list - that's the kind of player a team will get when they draft Blalock. He's not quite nimble enough to stick at RT in the pros, but he will make an excellent NFL guard, and can still fill in at RT in a pinch. Blalock is not the "freak of nature" type of OL prospect who has exceptional athleticism for a guy his size, instead he's just a rock: durable, steady, tough, and hard working. He started every game of his UT career. Blalock can drive block with the best of this class and should instantly improve his team's running game. He'll be a solid late first/early second round investment.

Grubbs is a classic road grader guard who would fit in well in a power running attack. He plays mean, and his athleticism and strength allow him to channel that intensity. Grubbs will stun defenders with his initial punch and explosion, but he can also seal the deal on the move out in space. He had a rough combine because he was ill, but redeemed himself at Auburn's pro day. If Grubbs can tighten up his game, he will be dominant. He should not last past the mid 2nd round.

Like Blalock, Sears will be making a shift inside after playing tackle in college. He just doesn't have the athleticism to be able to hang with NFL DEs in pass protection. On the plus side, Sears athleticism actually becomes a strength when he moves inside. Sears also brings top notch smarts, toughness, and leadership to the table. He will make a fine late 1st or early 2nd round pick.

It's a little more difficult to get a feel for Satele the pro than the other guys on this list because of Hawaii's gimmicky offense. We know that he'll be excellent in pass protection - Hawaii's offense heavily emphasizes the pass. Satele springs out of his stance and is a natural knee bender that moves to mirror pass rushers and pick up stunts and blitzes - it's no surprise that he also played some guard and tackle. Satele grades much lower as a run blocker and is not strong enough to be a great drive blocker, but the raw materials are there for a good zone blocking center. He should be off the board by the end of day 1.

It's very difficult to project whether Beekman will play center or guard in the pros, but this only adds to his value. He's another true road grader who uncoils into the defender in front of him and won't let go until he drives him into the parking lot. While he grades well as a mauler, Beekman's downside is apparent when you watch him move - he's stiffer and slower than the guys above him on this list. Once considered a possible first round pick, Beekman showed up out of shape at the combine and struggled. He should still get his name called late in the first day.

Must be something in the beef down here in Texas - Ramirez's 40 reps at the combine tied Blalock, and it shows you exactly what you'll get in Ramirez: a guy who can obliterate a defender with brute strength. Ramirez doesn't have the ideal frame or athleticism to make it at the next level, but he makes up for that with toughness, intensity, smarts, and game awareness. He's better in pass pro than you would think - like Satele, Ramirez was responsible for wide gaps in a pass happy offense. He should go late on Saturday or early on Sunday.

Datish played all five O-line positions at Ohio State. He has starting experience at guard, tackle, and center. His versatility will prove invaluable to the team that drafts him. On the other hand, he lacks the strength and bulk to move NFL defensive tackles, and gets by more on grit, quicks, and smarts than physical gifts. He would make a great "6th man" and should be an early second day pick.

Fry was one of the less impressive players at the Senior Bowl weigh-in, but he showed why football ain't a beauty contest once they put on the pads in Mobile. He's a former high school state champion in wrestling, and it shows in his playing style. Fry won't beat his opponent with quickness or strength, he's much more comfortable playing like a streetfighter than a technician. He projects at guard or center, and should be a second day find for a team that values junkyard dog types on the O-line.

Alleman's the first guy on this list who has to rely on his workout numbers more than his game tape. His quickness, speed, and explosion numbers were all among the best at the combine at OG. Alleman is somewhat behind the curve as a former defensive lineman at Pitt before he transferred to the Zips. He shows the strength and tenacity to be a good drive blocker and the athleticism to hang with elite NFL defenders, but he's a project. A team could pull the trigger on him as early as the 2nd round, or as late as the 5th.

Harris is another name on this list with experience all over the offensive line, a quality that only adds value in a league with the injury frequency of the NFL. Like Datish, he has started at guard, tackle, and center. Harris has the toughness, intensity, intelligence, work ethic, and push off the snap to hang at the next level, but his lack of quickness could cap his potential. He projects better as a center and should hear his name called on the 2nd day.

Wrotto is another that falls into the "late to the game, but has the tools to succeed" category. Mansfield started his career at DT, and only moved to the offensive line for his Senior season. He's got the size/athleticism combination to project as a future starting NFL lineman, but he'll need a lot of work on technique and aggressiveness to reach that potential. Like Alleman, Wrotto could go earlier than expected if a team thinks they have the right personnel to unlock the potential of this nimble big man who packs a punch, but is still in his infancy as an offensive lineman.

Like his Auburn teammate, Duckworth is a great fit for a team that likes its linemen to resemble steamrollers. He's another former defensive lineman who plays with a defender's mean streak. Duckworth can blast into and easily move defenders in the running game, but don't ask him to dance around to mirror pass rushers. He's one of the best in this class at defeating the guy directly in front of him, but might lack the athleticism to do much else as a blocker.

Stephenson joins Alleman, Wrotto, and Duckworth as former college defensive lineman, but he's not nearly the project that they are. His limitations come in the form of two surgically repaired shoulders and a lack of outstanding strength or explosion off the snap. Still, this athletic center just gets the job done - he was a wall all week at the Texas vs. the Nation game.

Jones is another lineman who does not possess eye-popping athleticism or ideal size, but instead relies on technique and intelligence, to consistently neutralize defenders. He's a strong, tough, versatile drive blocker who should be a nice backup at multiple positions with starter upside as a second day pick.

Bennett has an ideal frame for an NFL guard, and he could develop into a starter with more functional strength. Like his teammate, Fry, he explodes into the defender off the snap and plays with a mean streak. Bennett will need to tighten up his technique and get thicker, as the NFL widebodies inside will have an easy time pushing him around. He will also struggle in space and on the move. Bennett will provide depth as a mid to late round pick.

Stephenson follows the trend of defenders converting to the offensive side of the ball after having the job of attacking offensive lineman during part of his career at Rutgers. He moves well and holds his ground, but he doesn't have the bulk or pop off the snap to push guys around very often. He's a late round project who could blossom once he's allowed to concentrate on one position.

Like a lot of the true centers on this list, Lucas should succeed as long as he's used the right way. He moves well, has terrific technique and understanding of the game, and plays very tough. Lucas's problem is that he's not a mauler. He looks like the type of guy that will get pushed around when he's asked to hold his ground in pass pro and he lacks the size and strength to open big holes in the running game. His name could get called anywhere from the early to late 2nd day.

Nwaneri has the quickness, strength, and explosion to rank higher on this list, but he's also raw and missed the 2005 season after being suspended from the team for fighting. He's a high risk/high reward late second day pick who could pay off for the team that takes a chance on him.

Sendlein is not going to impress anyone with his workout numbers, and he's somewhat immobile, but being the gritty leader of a great Texas offensive line has to be worth something. He's another lineman who can consistently handle the guy right in front of him, but struggles in space. His dad, Robin, was a star LB at UT and played in the NFL for eight years.

Worth Mentioning:

Mark Fenton, Colorado 6'4" 290 - Fenton is a road grader at center who will fit in a power running attack. He's got starter upside, but the broken leg that interrupted his senior year has put a dent in his draft stock.

Dan Mozes, West Virginia, 6'3" 293 - Mozes plays similar to Kalil, but he lacks his physical tools to hang and will have to fight for his shot at the next level.

Kasey Studdard, Texas, 6'3" 303 - Studdard, like Sendlein, is a physical, strong lineman who can push around the guy right in front of him, but seems like a liability once you get him out in space.

Dan Santucci, Notre Dame, 6'4" 301 - Santucci excels as a pulling guard in the running game, but he lacks the bulk and strength to bully defenders and hold up as a pass blocker.

Drew Mormino, Central Michian, 6'3" 299 lbs. - Mormino is a smart, strong lineman who gets a good push off the snap, but he lacks the skills in space that NFL teams look for in a center.

Brian Daniels, Colorado, 6'4" 303 - Daniels was outstanding in the Shrine Game. He's the type who may not have the upside to ever be a starter, but he'll make a quality, dependable backup in the NFL.

T.J. Downing, Ohio State, 6'5" 298 - Downing fits the Big Ten OL profile well - tough, smart, great technique, but lacking outstanding strength, bulk, or athleticism. He should stick on a roster as a backup.

Kyle Cook, Michigan State, 6'4" 291 - See Downing, T.J. -.a gritty, dependable, smart player who doesn't seem to have the tools to translate well to the next level, but is still the kind of player coaches love.

Kurt Quarterman, Louisville, 6'4" 350 - Quarterman is enormous, but surprisingly nimble for such a widebody. Most areas of his game need work. Don't be surprised if he's reunited with Bobby Petrino in Atlanta.

Jake Kuresa, BYU, 6'3" 343 - Kuresa is HUGE and can defeat most defenders when it comes to strength. He devours smaller defenders. He could be a nice surprise with a few years of polish.

Tala Esera, Hawaii, 6'3" 312 - Esera seems ready to go in pass pro like the other Hawaii offensive linemen in this draft, but he's a tackle too small to stay outside, and he might not have the grit or strength to survive inside.

Kyle Young, Fresno State, 6'5" 338 - Young's draft stock has seen better days. He was suspended for the end of the season, but Young is a man mountain who can blot out the defender opposite him at the line of scrimmage