If scientists and scouts could create a prototypical QB, it would be Quinn.

WHO'S BEHIND JAMARCUS RUSSELL AND BRADY Quinn at QB? Is there any depth at RB besides Adrian Peterson? How deep is the Class of '07 at linebacker? How many safeties are projected first-round picks? Will it be a great year for offensive linemen? The best prospects by position... 

 QUARTERBACKS 

Potential First-Round Picks: Three or four.
Overall Depth: Solid. Quinn is probably the most NFL-ready of the bunch but Russell may have the most upside of any QB to come along in awhile. There is a big drop-off after those two, but the guys in the rest of the field are at the very least intriguing. Smith may end up being a star regardless of his doubters...

1. JaMarcus Russell, QB, LSU
Russell's size and jaw-dropping arm strength make up for his lack of big-time numbers.

2. Brady Quinn, QB, Notre Dame
If scientists and scouts could create a prototypical QB, it would be Quinn. Underrated?

3. Troy Smith, QB, Ohio State
The Heisman Trophy winner has to overcome questions about his size, but he's a gamer.

4. Drew Stanton, QB, Michigan State
Injuries and a lack of elite production make him highly underrated. He could be Jay Cutler.

5. Trent Edwards, QB, Stanford
Once a top prospect, Edwards suffered injuries and inconsistency at Stanford. A sleeper.

6. Jordan Palmer, QB, UTEP
The brother of Bengal star Carson, Palmer has a nice frame and good leadership skills.

7. Kevin Kolb, QB, Houston
One of the NCAA's most productive passers ever, Kolb is incredibly accurate. Underrated?

8. Chris Leak, QB, Florida
Like Troy Smith, Leak is a very successful leader with size issues. Could surprise eventually.

9. Toby Korrodi, QB, Central Missouri State
A small-school success with a big arm, nice frame, and good vision, Korrodi may be a steal.

10. John Beck, QB, BYU
Highly productive and accurate, Beck must overcome questions about size and durability.


 RUNNING BACKS 

Potential First-Round Picks: Three or four.
Overall Depth: Strong at the very top, then questionable after that. Peterson may be a star as a rookie and has been widely overlooked, while Lynch and Bush also have big-time upside. After them there are a lot of question marks...

1. Adrian Peterson, RB, Oklahoma
He doesn't get the hype he deserves. Few tailbacks anywhere have his size-speed mix.

2. Marshawn Lynch, RB, California
This year's LenDale White? Strong and explosive, Lynch also has some character issues.

3. Michael Bush, RB, Louisville
Somewhat overlooked because of a broken leg, Bush has an elite mix of size and speed.

4. Chris Henry, RB, Arizona
A fantastic Indy Combine vaulted Henry to this spot. Needs to show more patience.

5. Antonio Pittman, RB, Ohio State
Pittman is a well-rounded runner with great hands. He'll need some time, but has upside.

6. Darius Walker, RB, Notre Dame
He was overlooked at Notre Dame but produced. Walker lacks elite tools but is very skilled.

7. Kenny Irons, RB, Auburn
His short tenure as a No.1 back makes him a bit raw, but Irons has excellent raw tools.

8. Brandon Jackson, RB, Nebraska
Despite a lack of elite size or speed, Jackson is super-elusive. He may be a project early on.

9. Lorenzo Booker, RB, Florida State
Rarely a starter despite his prodigious talents, Booker has speed to burn but must bulk up.

10. Kolby Smith, RB, Louisville
A very well-rounded back, Smith needs to prove he can handle a big load and stay healthy.


 FULLBACKS 

Potential First-Round Picks: One.
Overall Depth: Middling. Leonard is a unique talent and has the goods to be a star, but after that there aren't many pure and polished fullbacks. Several of these players may find themselves at other positions down the road...

1. Brian Leonard, FB, Rutgers
Probably the top fullback in the draft, Leonard is a versatile, team-first player. A leader.

2. Tony Hunt, FB/RB, Penn State
A featured back in college, Hunt projects as a fullback in the NFL. An excellent blocker.

3. Ben Patrick, TE/FB, Delaware
Patrick's experience as a halfback and tight end suggest he may be a solid NFL H-back.

4. Cory Anderson, FB, Tennessee
Less a running back than a receiver, Anderson is a powerful blocker with all the tools.

5. LeRon McClain, FB, Alabama
A bit short, McClain is still a great blocker with leadership skills and special teams upside.


 WIDE RECEIVERS 

Potential First-Round Picks: Four or five.
Overall Depth: Excellent. Johnson may be the finest wideout prospect in a decade and after him there are several receivers who may find themselves as starters this season. The fiel dis split into Johnson and the rest, but Ginn, Meachem, and others are also top talents...

1. Calvin Johnson, WR, Georgia Tech
Very possibly the top overall talent in the draft, Johnson could become a star as a rookie.

2. Ted Ginn Jr., WR, Ohio State
His stock is up and down, but very few players have Ginn's raw speed or big-play abilities.

3. Robert Meachem, WR, Tennessee
His stock has been sky-rocketing heading into the draft. His breakaway speed is impressive.

4. Dwayne Bowe, WR, LSU
Somewhat overlooked, Bowe has the makings of a top possession target in the NFL.

5. Dwayne Jarrett, WR, USC
Dominant in college and possessing excellent size, Jarrett must prove he's fast, and mature.

6. Sidney Rice, WR, South Carolina
While not quite dominant at SC, Rice has all the goods teams covet in a wideout prospect.

7. Anthony Gonzalez, WR, Ohio State
Overlooked because of more-hyped teammates, Gonzalez is the whole package at wideout.

8. Jason Hill, WR, Washington State
His 4.32 40 at the Indy Combine helped this productive sleeper solidify his elite status.

9. Johnnie Lee Higgins, WR, UTEP
Higgins was a top prospect heading into the Indy Combine but fell flat there. Still, a talent.

10. Jacoby Jones, WR, Lane
A late bloomer and major sleeper, Jones is a former track star. High-risk, high-reward?


 TIGHT ENDS 

Potential First-Round Picks: One or two.
Overall Depth: Not great. Olsen only surged to elite status with some lights-out workouts at the Indy Combine, and after him many of the top prospects are either raw or lacking in elite tools...

1. Greg Olsen, TE, Miami
While not dominant in college, the raw Olsen wowed teams at the Indy Combine.

2. Zach Miller, TE, Arizona State
Probably the most accomplished tight end available, Miller is smart, skilled, and quick.

3. Scott Chandler, TE, Iowa
Still a bit of a project, Chandler has the height and hands to be a top tight end, eventually.

4. Michael Allan, TE, Whitworth College
Allan's rare mix of raw speed and size, with great hands, make him a small-school sleeper.

5. Matt Spaeth, TE, Minnesota
Productive and massive, Spaeth is a good blocker and gritty competitor. A big, solid target.

6. Kevin Boss, TE, Western Oregon
Very agile for a guy his size, Boss also has great hands and is a solid blocker. A big sleeper.

7. Joe Newton, TE, Oregon State
Well-rounded and productive, Newton has great size and technique, but sub-par speed.

8. Martrez Milner, TE, Georgia
Undersized and not exactly sure-handed, Milner is nonetheless a top athlete at tight end.

9. Matt Herian, TE, Nebraska
A superb athlete and receiver, Herian needs to add more muscle and improve as a blocker.

10. Clark Harris, TE, Rutgers
Highly consistent and blessed with good size and hands, Harris needs work on his blocking.