Over the last few seasons I've felt pretty confident about at least the top half of my NFL Mock Draft. But I can honestly say that this weekend's draft has the potential to be one of the most unpredictable in the last four or five seasons. With a number of potential trade opportunities, several teams with multiple first round picks, depth at key positions like running back, wide receiver and defensive end, as well as wild swings in the ranking and grading of a lot of players, I expect a lot of random insanity to take place in The Biggest Gamble in Sports.

So with that in mind, here is Doc's Sports 2009 NFL Mock Draft, Version 4.0:

1. Detroit Lions - Matthew Stafford, QB, Georgia
Just take a look through the litany of names of first-round quarterbacks that busted out over the last decade. And the Lions are still taking a QB anyway, even though there are questions about his ceiling and even though this team is ill equipped to win even if it is getting competent quarterback play.

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2. St. Louis Rams - Jason Smith, OT, Baylor
Apparently Smith, who started the draft process as the No. 4 OT, has been that impressive over the last few months. The Rams have to rebuild their line if they want to have any hope of competing.

3. Kansas City Chiefs - Aaron Curry, LB, Wake Forest
Curry is being touted as some as the "best player available". If he is somehow off the board then the Chiefs would end up taking whomever they deem the highest-rated offensive lineman. Either way, Kansas City has had a solid offseason so far and is in the catbird seat here. I will say that I'm curious why this team never seemed to consider Michael Crabtree. He, Dwayne Bowe, Tony Gonzalez and Larry Johnson would offer Matt Cassel a lethal amount of options.

4. Seattle Seahawks - Eugene Monroe, OT , Virginia
There really are a lot of different directions that the Seahawks could go here. Just because they signed T.J. Houshmandzada I wouldn't totally rule out them going after Mike Crabtree. Just because they have Matt Hasselbeck I wouldn't completely rule out them going after Mark Sanchez. But their line is not what it once was and this is the "safe" pick.

5. Cleveland Browns - Michael Crabtree, WR, Texas Tech
Donte Stallworth is likely headed to the pokey and Braylon Edwards is likely headed for another city. I think the Browns need to work a deal to move Edwards, who is a free agent after this year, to get a couple more picks. If they can do that then they can take his replacement here and use everything else to shore up its defense.

6. Cincinnati Bengals - Andre Smith, OT, Alabama
My position has not wavered here. In the end, talent will win out. I know there was nothing but hand wringing about Smith and his combine debacle. But that was two months ago. I'm guessing he's been working out since then. And the bottom line is that the Bengals have never wavered from taking on talented-but-troubled head cases. The Bengals are desperate for an OT and Smith is the best on the board.

7. Oakland Raiders - Brian Orakpo, DE/LB, Texas
Let me just say that the rationale that "Al Davis likes fast guys so the Raiders are going to take Jeremy Maclin" is one of the most idiotic things I've heard about this draft. Some people actually project Maclin going before Crabtree based on this rationale. Bottom line is that there are a lot of wideouts in this draft. If Crabtree is there he's a steal and the Raiders take him. Otherwise they need defense.

8. Jacksonville Jaguars - B.J. Raji, DT, Boston College
Mark Sanchez is enticing, but I think that the Jaguars go with defense. They just signed Tory Holt so I think they are going to be willing to give David Garrard some time to produce with a top-flight wideout before they start planning his replacement.

9. Green Bay Packers - Everett Brown, DE/OLB, Florida State
This pick has to be defense. I know that they need offensive linemen, but the bottom line is that the Packers are moving from a 4-3 to a 3-4 and have all the wrong personnel. I'm really not sure who the hell the Pack will take here but it better be a defender.

10. San Francisco 49ers - Tyson Jackson, DE, LSU
As much as I think that the Niners would like to get another offensive lineman here, I also know that Mike Singletary has to be foaming at the mouth to bring in some fresh blood on the defense. Jackson's stock appears to be pretty high and should help a team that only registered 30 sacks last year.

11. Buffalo Bills - Michael Oher, OT, Mississippi
I think the Bills traded Jason Peters because they knew that Oher - or one of the other top tackles - would fall this far. They could use some defensive ends, but already have a ton of money locked up into that position. They could use a tight end but Brandon Pettigrew is the second most overrated player on the board behind Josh Freeman. And they could use some interior offensive line help but will get that later.

12. Denver Broncos - Vontae Davis, CB, Illinois
If the draft were to shake out like this I don't think it would be a good thing for the Broncos. They need physical, impact players in the front seven and the best ones might be off the board. But with two first rounders they can afford to take one of the top players available at their position.

13. Washington Redskins - Aaron Maybin, DE/LB, Penn State
The Redskins really, really need one of the top tackles to fall to them. But now that Buffalo is scouting that situation I don't think that it's going to happen. Instead they will go after a pass rusher with some upside that can give them what they were hoping to get from Jason Taylor.

14. New Orleans Saints - Malcolm Jenkins, S, Ohio State
I'm not high on Jenkins at all. But the Saints don't have much of a choice. They need secondary help. And now that Taylor Mays is back at USC they'll have to settle for Jenkins.

15. Houston Texans - Clay Matthews, OLB, USC
The Texans are set in the front four but need help at linebacker and in the secondary. I'm not that high on Matthews. But there is no denying that there is a lot of buzz around this kid. I think he's a bust. So that means he's a perfect fit in Houston.

16. San Diego Chargers - Brian Cushing, LB, USC
Don't be stunned if the Chargers target one of the top two running backs - Beanie Wells or Knowshown Moreno - in spite of the fact that LT inked a new deal. The Chargers don't' have a lot of glaring holes and go after the proverbial "Best Player Available". They have to be familiar with Cushing's work up north and I think the kid is going to be a player.

17. New York Jets - Mark Sanchez, QB, USC
If this is the situation then there is no way that the Redskins don't trade up and go after Sanchez. I think that if Sanchez were to make it past Jacksonville the Jets would have to make a move. And if Sanchez made it past San Fran - which would be 50-50 - the Jets still have to worry about Washington.

18. Denver Broncos (from Chicago) - Robert Ayers, OLB, Tennessee
I don't agree with it, but apparently Ayers has some steam in this last week. I think that the Broncos should grab one of the USC linebackers. Or, if they get a DE or LB with the first pick, I think they should grab a corner in this slot. Either way the Broncos have a lot of options and need two athletic defenders.

19. Tampa Bay Bucs - Michael Johnson, DE, Georgia Tech
Tampa Bay really could use a DT or LB at this slot as well, as their defense was not up to snuff late in the year. Also, don't think that a wide receiver is out of the question. And if Jeremy Maclin is on the board he would be really difficult to pass up on.

20. Detroit Lions (from Dallas) - Ebon Britton, OT, Arizona
The Lions have three of the top 35 picks so they can reach here. They grabbed their quarterback already so I think it would be wise to start trying to build an offensive line around him.

21. Philadelphia Eagles - Knowshon Moreno, RB, Georgia
Moreno is way too talented to fall this far. But, again, who in the 20s needs a running back? And teams don't normally like to take first rounders to sit on the bench. I think that Philly's gamble would pay off and they would end up with two of the top skill guys in the draft.

22. Minnesota Vikings - Jeremy Maclin, WR, Missouri
I think it's a longshot that Maclin falls this far. But if he doesn't go in the Top 10 then which teams in the middle 10 really need a wideout? this is still an area of need for the Vikings. Harvin is injury prone. But with AP, Bernard Berrian and now Maclin in the slot the Vikes would have three gamebreakers.

23. New England Patriots - Rey Maualuga, ILB, USC
I love this guy and I can't believe he is going to fall into the later stages of the first round. He is a leader and, more importantly, he is a hitter. The Patriots have a lot of needs - they have a ridiculous amount of guys headed for free agency after this season - and they need more players in the front seven of their aging defense.

24. Atlanta Falcons - Peria Jerry, DT, Mississippi
The Dirty Birds need to shore up their defense. And with Grady Jackson finally having moved on I think that Atlanta need some beef in their front four. Don't be surprised if they go for a linebacker here either. Keith Brooking has moved on to Dallas and the Falcons would like to upgrade the position with some athleticism.

25. Miami Dolphins - Greg Hardy, DE, Mississippi
I think that Hardy is an absolute animal, despite being slowed by injuries the past two seasons. I think that Bill Parcells will continue to build on his team's strength - defense - and will try go upgrade at some skill positions and in the secondary later in the draft.

26. Baltimore Ravens - Alphonso Smith, CB, Wake Forest
Smith is one of those guys - like Mays, Cushing, Maualuga, and Max Unger - that I just think is way underrated right now. All the guy did in college was make plays. The Ravens have some glaring openings in the secondary and I think that they have to go after one of the best corners still available.

27. Indianapolis Colts - Darrius Heyward-Bey, WR, Maryland
It's odd to think of the Colts without Marvin Harrison. But that's exactly where they are at. H-B flashed some jets at the combine and I think that Peyton Manning would love another large target, a la Reggie Wayne, to work with.

28. Buffalo Bills - Brandon Pettigrew, TE, Oklahoma State
See, this is what the Bills could end up with if they don't reach for Pettigrew with their top pick. If all of the tackles are off the board they will take him there and then grab a defensive end with this selection. Regardless, the Bills have a lot of flex. And as long as they get a tackle they should be fine shape.

29. New York Giants - Hakeem Nicks, WR, North Carolina
I don't try to project trades in my mock draft because there are just too many different scenarios that can come up. But I don't see any reason why the Giants should keep this pick instead of dealing it for Braylon Edwards. If Plaxico's money is coming off the books then they should have enough to appease Edwards. If not, they take another one of "my guys" that I think is going to be a beast in the NFL.

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30. Tennessee Titans - Percy Harvin, WR, Florida
This would work for the Titans. They definitely could use a big body to fill the enormous gap left by Albert Haynesworth. But they also found out last year, with Chris Johnson, what speed can do to upgrade an offense. The Titans could opt for another big wideout - Hakeem Nicks and Darrius Heyward-Bey are still options - but if Harvin falls this far he would offer some good value.

31. Arizona Cardinals - Beanie Wells, RB, Ohio State
If the Giants don't make a move on Edwards than I think that the Cardinals should move Anquan Boldin to the G-Men for their first rounder. Then the Cards could either grab a RB and WR to fill some gaps or they could use both picks to shore up their defense.

32. Pittsburgh Steelers - Max Unger, C, Oregon
The Steelers could use Unger because of his flexibility. He could eventually be another Pro Bowl center for the Steelers, but until then he can slide over and play some guard. They could grab a tackle or another defensive end here. Basically, it's all about depth for the defending world champions.

For info about Robert's picks? Check out his Insider's Page Here.