Here are my positional rankings for the 2013 NFL Draft, pre-Combine workouts. I'll list both my personal rankings, as well as a parenthetically-listed draft projection for each player.
QUARTERBACK
1. Geno Smith, West Virginia (6-2, 218) (Top 10)
2. Zac Dysert, Miami (OH) (6-4, 230) (2nd or 3rd round)
3. Tyler Wilson, Arkansas (6-2, 215) (Top 50)
4. Matt Barkley, USC (6-2, 230) (Top 50)
5. E.J. Manuel, Florida State (6-5, 238) (2nd or 3rd round)
6. Ryan Nassib, Syracuse (6-2, 228)(Top 50)
7. Mike Glennon, North Carolina State (6-7, 220) (1st round)
8. Matt Scott, Arizona (6-3, 196) (3rd or 4th round)
9. Tyler Bray, Tennessee (6-6, 232) (3rd round)
10. Sean Renfree, Duke (6-5, 225), (5th or 6th round)
11. Landry Jones (6-4, 219) (4th or 5th round)
RUNNING BACK
1. Eddie Lacy, Alabama (5-11, 231) (Top 40)
2. Andre Ellington, Clemson (5-9, 199) (2nd or 3rd round)
3. Montee Ball, Wisconsin (5-10, 214) (2nd or 3rd round)
4. Joseph Randle, Oklahoma State (6-0, 200) (2nd or 3rd round)
5. Giovani Bernard, North Carolina (5-8, 202) (2nd or 3rd round)
6. Stepfan Taylor, Stanford (5-9, 214) (3rd or 4th round)
7. George Winn, Cincinnati (5-11, 220) (5th round)
8. Le'Veon Bell, Michigan State (6-1, 230) (3rd or 4th round)
9. Christine Michael, Texas A&M (5-10, 221), (3rd or 4th round)
10. Marcus Lattimore, South Carolina (5-11, 220) (3rd or 4th round)
11. Spencer Ware, LSU (5-11, 225) (4th or 5th round)
12. Johnathan Franklin, UCLA (5-10, 205) (4th or 5th round)
13. Denard Robinson, Michigan (5-10, 199) (4th round)
14. Zac Stacy, Vanderbilt (5-9, 210) (4th or 5th round)
15. Kerwynn Williams, Utah State (5-8, 196) (4th or 5th round)
16. Cierre Wood, Notre Dame (6-0, 215) (4th or 5th round)
17. Ray Graham, Pittsburgh (5-8, 195) (4th or 5th round)
18. Mike Gillislee, Florida (5-11, 208) (4th or 5th round)
19. Chris Thompson, Florida State (5-7, 192) (5th thru UDFA)
20. Theo Riddick, Notre Dame (5-11, 200) (6th thru UDFA)
21. Robbie Rouse, Fresno State (5-7, 190) (6th thre UDFA)
22. Kenjon Barner, Oregon (5-11, 195) (6th thru UDFA)
WIDE RECEIVERS
1. DeAndre Hopkins, Clemson (6-0, 214) (1st round)
2. Cordarrelle Patterson, Tennessee (6-2, 216) (Top 12)
3. Stedman Bailey, West Virginia (5-10, 195) (2nd round)
4. Tavon Austin, West Virginia (5-8, 174) (Top 40)
5. Justin Hunter, Tennessee (6-4, 200) (Top 50)
6. Keenan Allen, California (6-2, 200) (Top 40)
7. Markus Wheaton, Oregon State (5-11, 183) (2nd round)
8. Chris Harper, Kansas State (6-1, 230) (3rd round)
9. Robert Woods, USC (6-0, 201) (2nd round)
10. Quinton Patton, Louisiana Tech (6-0, 202) (2nd or 3rd round)
11. Da'Rick Rogers, Tennessee Tech (6-2, 206) (2nd or 3rd round)
12. Marquise Goodwin, Texas (5-9, 183) (3rd or 4th round)
13. Terrance Williams, Baylor (6-2, 208) (3rd round)
14. Tavarres King, Georgia (6-0, 192) (4th or 5th round)
15. Kenny Stills, Oklahoma (6-0, 190) (4th round)
16. Aaron Dobson, Marshall (6-3, 203) (4th round)
17. Justin Brown, Oklahoma (6-3, 207) (4th or 5th round)
18. Ace Sanders, South Carolina (5-7, 173) (5th round)
19. Cobi Hamilton, Arkansas (6-2, 199) (4th or 5th round)
20. Chad Bumphis, Mississippi State (5-10, 202) (4th or 5th round)
21. Mark Harrison, Rutgers (6-3, 234) (4th or 5th round)
22. Corey Fuller, Virginia Tech (6-2, 197) (5th or 6th round)
23. Uzoma Nwachukwu, Texas A&M (5-11, 198) (5th or 6th round)
24. Ryan Swope, Texas A&M (6-0, 204) (4th or 5th round)
TIGHT ENDS
1. Tyler Eifert, Notre Dame (6-5, 250) (Top 45)
2. Jordan Reed, Florida (6-2, 236) (2nd round)
3. Travis Kelce, Cincinnati (6-5, 255) (2nd round)
4. Zach Ertz, Stanford (6-5, 249) (2nd round)
5. Gavin Escobar, San Diego State (6-6, 254) (2nd round)
6. Dion Sims, Michigan State (6-5, 262) (2nd or 3rd round)
7. Levine Toilolo, Stanford (6-8, 260) (3rd or 4th round)
8. Chris Gragg, Arkansas (6-3, 244) (4th or 5th round)
9. Nick Kasa, Colorado (6-6, 269) (4th or 5th round)
10. Zach Sudfeld, Nevada (6-6, 271) (5th or 6th round)
11. Mychal Rivera, Tennessee (6-3, 242) (5th thru 7th rounds)
12. Vance McDonald, Rice (6-4, 267) (3rd thru 5th rounds)
OFFENSIVE TACKLES
1. Lane Johnson, Oklahoma (6-6, 303) (Top 12)
2. Luke Joeckel, Texas A&M (6-6, 306) (Top 10)
3. Eric Fisher, Central Michigan (6-7, 306) (Top 10)
4. D.J. Fluker, Alabama (6-5, 339) (Top 16)
5. Menelik Watson, Florida State (6-5, 310) (Top 40)
6. Brennan Williams, North Carolina (6-6, 318) (2nd round)
7. Kyle Long, Oregon (6-6, 313) (2nd round)
8. Reid Fragel, Ohio State (6-8, 308) (2nd or 3rd round)
9. Jordan Mills, Louisiana Tech (6-5, 316) (3rd round)
10. Terron Armstead, Arkansas-Pine Bluff (6-5, 306) (2nd or 3rd round)
11. David Quessenberry, San Jose State (6-5, 302) (3rd or 4th round)
12. David Bakhtiari, Colorado (6-4, 299) (2nd or 3rd round)
13. Dallas Thomas, Tennessee (6-5, 306) (2nd or 3rd round)
14. Chris Faulk, LSU (6-5, 331) (3rd or 4th round)
15. Luke Marquardt, Azusa Pacific (6-8, 315) (4th or 5th round)
16. Xavier Nixon, Florida (6-6, 321) (4th or 5th round)
17. Justin Pugh, Syracuse (6-4, 307) (3rd or 4th round)
18. Oday Aboushi, Virginia (6-5, 308) (4th or 5th round)
GUARDS
1. D.J. Fluker, Alabama (6-5, 339) (Top 16)
2. Chance Warmack, Alabama (6-2, 317) (Top 20)
3. Jonathan Cooper, North Carolina (6-2, 311) (1st round)
4. Larry Warford, Kentucky (6-3, 332) (2nd or 3rd round)
5. David Bakhtiari, Colorado (6-4, 299) (2nd or 3rd round)
6. Dallas Thomas, Tennessee (6-5, 306) (2nd or 3rd round)
7. Barrett Jones, Alabama (6-4, 306) (2nd or 3rd round)
8. Travis Frederick, Wisconsin (6-4, 312) (2nd or 3rd round)
9. Kyle Long, Oregon (6-6, 313) (2nd round)
10. Brian Winters, (6-4, 320) (3rd or 4th round)
11. Justin Pugh, Syracuse (6-4, 307) (3rd or 4th round)
12. Alvin Bailey, Arkansas (6-3, 312) (4th or 5th round)
CENTERS
1. Jonathan Cooper, North Carolina (6-2, 311) (1st round)
2. Barrett Jones, Alabama (6-4, 306) (2nd or 3rd round)
3. Travis Frederick, Wisconsin (6-4, 312) (2nd or 3rd round)
4. Brian Schwenke, California (6-3, 314) (3rd or 4th round)
5. Khaled Holmes, USC (6-3, 302) (4th or 5th round)
4-3 DEFENSIVE ENDS
1. Sheldon Richardson, Missouri (6-4, 295) (Top 10)
2. Ezekiel Ansah, BYU (6-6, 270) (Top 15)
3. Barkevious Mingo, LSU (6-5, 242) (Top 15)
4. Sam Montgomery, LSU (6-4, 260) (Top 40)
5. Alex Okafor, Texas (6-4, 260) (1st round)
6. Cornellius Carradine, Florida State (6-5, 264) (2nd round)
7. Dion Jordan, Oregon (6-7, 241) (Top 15)
8. Corey Lemonier, Auburn (6-4, 246) (Top 40)
9. Bjoern Werner, Florida State (6-4, 255) (1st round)
10. Margus Hunt, SMU (6-8, 280) (2nd or 3rd round)
11. Datone Jones, UCLA (6-5, 280) (2nd or 3rd round)
12. Damontre Moore, Texas A&M (6-4, 250) (2nd round)
13. Brandon Jenkins, Florida State (6-3, 260) (3rd or 4th round)
14. David Bass, Missouri Western State (6-5, 275) (3rd or 4th round)
15. John Simon, Ohio State (6-2, 260) (3rd or 4th round)
16. Quanterus Smith, Western Kentucky (6-5, 251) (4th or 5th round)
17. William Gholston, Michigan State (6-7, 275) (3rd or 4th round)
18. Malliciah Goodman, Clemson (6-4, 280) (4th or 5th round)
19. Michael Buchanan, Illinois (6-6, 240) (4th or 5th round)
4-3 DEFENSIVE TACKLES
1. Star Lotulelei, Utah (6-4, 320) (Top 5)
2. Sharrif Floyd, Florida (6-3, 303) (Top 5)
3. Sheldon Richardson, Missouri (6-4, 295) (Top 10)
4. Jesse Williams, Alabama (6-4, 320) (Top 35)
5. Kawann Short, Purdue (6-3, 310) (1st round)
6. Johnathan Hankins, Ohio State (6-3, 335) (Top 50)
7. Brandon Williams, Missouri Southern State (6-3, 325) (2nd or 3rd round)
8. Bennie Logan, LSU (6-3, 295) (2nd or 3rd round)
9. Akeem Spence, Illinois (6-1, 305) (2nd or 3rd round)
10. Datone Jones, UCLA (6-5, 280) (2nd or 3rd round)
11. Sylvester Williams, North Carolina (6-3, 320) (2nd or 3rd round)
12. John Jenkins, Georgia (6-3, 351) (2nd or 3rd round)
13. Jordan Hill, Penn State (6-1, 298) (3rd or 4th round)
14. Montori Hughes, Tennessee-Martin (6-4, 330) (4th or 5th round)
3-4 OUTSIDE LINEBACKERS
1. Dion Jordan, Oregon (6-7, 241) (Top 15)
2. Barkevious Mingo, LSU (6-5, 242) (Top 15)
3. Alex Okafor, Texas (6-5, 260) (1st round)
4. Cornellius Carradine, Florida State (6-5, 264) (2nd round)
5. Jarvis Jones, Georgia (6-3, 241) (1st round)
6. Corey Lemonier, Auburn (6-4, 246) (Top 40)
7. Trevardo Williams, Connecticut (6-2, 233) (2nd or 3rd round)
8. Damontre Moore, Texas A&M (6-4, 250) (2nd round)
9. Lerentee McCray, Florida (6-3, 249) (3rd or 4th round)
10. Brandon Jenkins, Florida State (6-3, 260) (3rd or 4th round)
11. David Bass, Missouri Western State (6-5, 275) (3rd or 4th round)
12. Kiko Alonso, Oregon (6-4, 242) (2nd or 3rd round)
INSIDE LINEBACKERS (3-4 or 4-3)
1. Kevin Minter, LSU (6-1, 245) (Top 40)
2. Arthur Brown, Kansas State (6-1, 228) (Top 50)
3. DeVonte Holloman, South Carolina (6-2, 241) (2nd or 3rd round)
4. Sean Porter, Texas A&M (6-2, 230) (2nd or 3rd round)
5. Kiko Alonso, Oregon (6-4, 242) (2nd or 3rd round)
6. Sio Moore, Connecticut (6-2, 229) (2nd or 3rd round)
7. Keith Pough, Howard (6-3, 236) (3rd or 4th round)
7. Manti Te'o, Notre Dame (6-2, 255) (2nd round
8. Khaseem Greene, Rutgers (6-1, 230) (3rd or 4th round)
9. Kevin Reddick, North Carolina (6-3, 240) (4th round)
10. Gerald Hodges, Penn State (6-1, 230) (4th or 5th round)
11. Jelani Jenkins, Florida (6-0, 237) (4th or 5th round)
12. Nico Johnson, Alabama (6-3, 245) (4th or 5th round)
13. Brandon Hepburn, Florida A&M (6-4, 235) (5th or 6th round)
14. Chase Thomas, Stanford (6-4, 245) (5th or 6th round)
15. Michael Mauti, Penn State (6-2, 239) (5th or 6th round)
4-3 OUTSIDE LINEBACKERS
1. Arthur Brown, Kansas State (6-1, 228) (Top 50)
2. DeVonte Holloman, South Carolina (6-2, 241) (2nd or 3rd round)
3. Sio Moore, Connecticut (6-2, 229) (2nd or 3rd round)
4. Kiko Alonso, Oregon (6-4, 242) (2nd or 3rd round)
5. Sean Porter, Texas A&M (6-2, 230) (2nd or 3rd round)
6. Keith Pough, Howard (6-3, 236) (3rd or 4th round)
7. Khaseem Greene, Rutgers (6-1, 230) (3rd or 4th round)
8. Zaviar Gooden, Missouri (6-2, 230) (3rd or 4th round)
9. Gerald Howard, Penn State (6-1, 230) (4th or 5th round)
10. Jelani Jenkins, Florida (6-0, 237) (4th or 5th round)
CORNERBACKS
1. Dee Milliner, Alabama (6-1, 199) (Top 12)
2. Xavier Rhodes, Florida State (6-1, 215) (Top 20)
3. Johnathan Banks, Mississippi State (6-2, 185) (Top 50)
4. Desmond Trufant, Washington (6-0, 185) (Top 50)
5. Blidi Wreh-Wilson, Connecticut (6-2, 190) (2nd or 3rd round)
6. Jordan Poyer, Oregon State (6-0, 190) (2nd round)
7. Leon McFadden, San Diego State (5-10, 185) (3rd or 4th round)
8. Robert Alford, Southeastern Louisiana (6-0, 185) (2nd or 3rd round)
9. Darius Slay, Mississippi State (6-1, 190) (3rd round)
10. Adrian Bushnell, Louisville (5-11, 184) (4th round)
11. B.W. Webb, William & Mary (5-11, 180) (2nd or 3rd round)
12. Terry Hawthorne, Illinois (6-0, 190) (3rd or 4th round)
13. David Amerson, North Carolina State (6-3, 194) (3rd or 4th round)
14. Jamar Taylor, Boise State (5-11, 195) (4th round)
15. Will Davis, Utah State (6-0, 186) (4th or 5th round)
SAFETIES
1. Matt Elam, Florida (5-10, 206) (1st round)
2. John Cyprien, Florida International (6-0, 210) (Top 40)
3. D.J. Swearinger, South Carolina (6-0, 210) (Top 50)
4. Kenny Vaccaro, Texas (6-1, 215) (1st round)
5. Bacarri Rambo, Georgia (6-0, 218) (2nd or 3rd round)
6. Tony Jefferson, Oklahoma (5-11, 212) (2nd or 3rd round)
7. Phillip Thomas, Fresno State (6-1, 215) (2nd or 3rd round)
8. Duke Williams, Nevada (6-0, 190) (3rd or 4th round)
9. J.J. Wilcox, Georgia Southern (6-0, 215) (3rd or 4th round)
10. Shawn Williams, Georgia (6-1, 220) (3rd or 4th round)
11. Eric Reid, LSU (6-2, 208) (2nd or 3rd round