Since the 2015 draft is already said and done and it's too early for 2016 rankings, I'll leave here my top five at each position for 2015.
Quarterback
1. Jamies Winston, Florida State
-The most pro-ready QB in the class, Winston has all the tools to become a franchise player, he just needs to get his head on straight off the field, and make smarter decisions on the field to cut back on the interceptions.
2. Marcus Mariota, Oregon
-Mariota was highly productive during his college career and even though a lot of people say he'll need time to transition from Oregon's spread system to a pro system, I tend to disagree. I think Mariota has the intelligence and skill to acclimate to the NFL game quicker than some think.
3. Garrett Grayson, Colorado State
-Grayson doesn't overwhelm anyone with his physical traits but he's a smart, confident QB with pro-system experience and the ability to throw with anticipation and timing.
4. Bryce Petty, Baylor
-Another spread system QB that gave scouts a hard time to get a good read on. Petty has a lot to learn to get up to speed for the NFL game but has plenty of traits that work in his favor.
5. Sean Mannion, Oregon State
-Mannion is a big dude and has a solid arm capable of making all the NFL throws. However, he doesn't offer much athletically and will have to speed up his release in order to avoid sacks and negative plays.
Honorable Mention: Brett Hundley, UCLA
-Hundley never quite took the next step in his senior season but throws the ball well enough and can be dangerous with his legs.
Running Backs
1. Todd Gurley, Georgia
-Despite the injuries, Gurley ranks as the top RB on my board. He has an amazing blend of size, speed and physicality. He's quick enough to make would-be tacklers miss and strong enough to run over others. Exciting player, just needs to stay healthy.
2. Melvin Gordon, Wisconsin
-Gordon was the most productive back in the nation last year and has the size and skills to continue that trend in the NFL.
3. Jay Ajayi, Boise State
-Ajayi is the most versatile back in the group. He's lined up in a variety of formations and has great hands to catch the ball out of the backfield. His knee is a major concern, though.
4. Tevin Coleman, Indiana
-Aggressive runner with the speed to go the distance. May not find the huge lanes in the NFL that he did in college, though.
5. Duke Johnson, Miami
-Johnson is a bit smaller but plays big and has slippery speed. Had a very productive college career and his skill set translates well to the next level.
Honorable Mention: David Johnson, Northern Iowa
-Johnson is a monstrous back with great burst and short area quickness plus the versatility to make plays happen on screens and throws to the flats.
Wide Receivers
1. Amari Cooper, Alabama
-Cooper's production last season was incredible. He's not the biggest or the strongest but he's a savvy route runner with sneaky speed and acceleration once the ball is in his hands.
2. Kevin White, West Virginia
-Has the size and explosiveness that makes for an exciting player. White had only one season of big time production but his skill set is top notch and he should enjoy a long, productive NFL career.
3. DeVante Parker, Louisville
-If not for an early season injury, Parker may have been in discussion to be the first receiver selected. Parker has size, speed and athleticism to make tough catches and produce once he has the ball.
4. Dorial Green-Beckham, Missouri
-DGB is a physical freak at 6'5", 237, but how much of his off-field problems will affect him moving forward?
5. Breshad Perriman, UCF
-Perriman blew away scouts and coaches with his blazing 40 time at his pro day but those skills didn't always show up on tape. He had some issues with dropped passes and he'll need to develop his route running more but his traits are enough to get him drafted early.
Honorable Mention: Nelson Agholor, USC
-There's nothing super flashy about Agholor, he doesn't have rare size or speed but he's a well-rounded athlete with plenty of versatility to allow him to line up anywhere as well as return kicks.
Tight Ends
1. Maxx Williams, Minnesota
-Big, athletic tight end with great hands and playmaking ability.
2. Clive Walford, Miami
-Aims to be the most well-rounded TE of the class, has the athleticism to stretch the seam and is developing as a blocker.
3. Jeff Heuerman, Ohio State
-Didn't have the chance to be very productive in Ohio State's offense but the size and skill set is there to turn into a viable starting TE in the league.
4. Nick O'Leary, Florida State
-His measurements won't wow anyone but he has a knack for getting open and coming through in clutch situations.
5. Jesse James, Penn State
-Towering figure at 6'7", James has some ground to cover if he wants to start in the NFL, but the potential is there. At the least, he's a great red zone target with his height giving him a distinct advantage.
Honorable Mention: MyCole Pruitt, Southern Illinois
-Solid hands and ability to get moving once he has the ball. A bit undersized and will need to speed it up with his routes.
Tackle
1. Brandon Scherff, Iowa
-Scherff is a powerful, dominant player with exceptional strength. He may move inside to guard but I feel he can excel at tackle as well.
2. Ereck Flowers, Miami
-Fluid athlete for his size, has strong hands and can control defenders once he latches on. Moves decently in space as well. Has a tendency to grab/hold when he gets caught out of position.
3. Andrus Peat, Stanford
-Terrific size for the position, Peat is perhaps the most natural tackle in the 2015 group. He recovers well to countering pass rush moves but might lack the mental edge to consistently win his match-ups.
4. Cedric Ogbuehi, Texas A&M
-Athletic with great feet and lateral movement skills. Sometimes late getting his hands up and also will be recovering from a knee injury for some time. At full health he's one of the best tackles coming out.
5. Jake Fisher, Oregon
-Smart, instinctive player who plays with solid leverage and a great understanding of angles. Still developing as a run blocker as he'll need to refine his hand movements and ability to drive defenders off the line.
Honorable Mention: Donovan Smith, Penn State
-Big time size with plenty of strength at the point of attack and quick enough feet. Sometimes lapses in fundamentals and his work ethic has been called into question. When he puts it all together he has displayed the ability to be a top notch player.
Guard
1. La'el Collins, LSU
-Athletic blocker with versatility, having played guard to start his college career but played left tackle during his last two years. Quick feet with plenty of power though sometimes will get off-balance and over-extend. Tons of upside, probably begins life in the NFL as a guard with serious potential to become a franchise left or right tackle down the road.
2. Laken Tomlinson, Duke
-Incredibly smart player with the desired demeanor for a guard. Displays good fundamentals and plays through the whistle. Not the most athletic, struggles a bit in space but the effort will never be less than 100%.
3. AJ Cann, South Carolina
-Shorter than average but has a very wide frame and squares himself up nicely making it difficult to get around him. Powerful hands and good awareness but does lack some movement skills in space.
4. Ali Marpet, Hobart
-Division III prospect who dominated his competition playing left tackle, likely moves inside at the next level. Smart, instinctive player with sound fundamentals and adequate movement skills.
5. Tre' Jackson, Florida State
-Big man that moves well in space and has feet quick enough to pull down the line and get out to the second level.
Honorable Mention: John Miller, Louisville
-Very strong player with violent hands and a powerful upper body. Tends to rely on that upper body strength a bit too much at times and will need to move his feet more in the NFL.
Center
1. Hroniss Grasu, Oregon
-Versatile center with good movement skills. Slightly undersized, can get overwhelmed by bigger players.
2. Max Garcia, Florida
-Quick feet, sets up square to the line and seals off angles. Flexibility in position, has played guard as well.
3. BJ Finney, Kansas State
-Smart, fundamentally sound player who gives great effort. Not overly athletic, loses leverage at times.
4. Andrew Gallik, Boston College
-Durable, smart player with a decently well-rounded game. Struggles finishing blocks, can get overwhelmed by larger players.
5. Reese Dismukes, Auburn
-Another tough and durable player with good intelligence and decent fundamentals. Not a great athlete, might struggle at the next level.
Cornerback
1. Trae Waynes, Michigan State
-Aggressive, physical corner not afraid to mix it up at the line. Works will in both man and zone. Ball skills are developing, made a lot of progress during his final year at Michigan State.
2. Marcus Peters, Washington
-Fluid athlete, solid lateral movement, quickness to break on the ball. Off-field issues a concern.
3. Kevin Johnson, Wake Forest
-Technically sound and intelligent corner with shutdown ability. Reads the QB, times his breaks well, recognizes routes. Build is a bit thin, struggles as an open field tackler at times.
4. Eric Rowe, Utah
-Has the size NFL teams are looking for in today's corners. Good cover skills with plenty of lateral quickness and a burst to break on the ball. Needs to work on finding the ball while in coverage.
5. Byron Jones, Connecticut
-Superb athlete, set records at the Combine. Battles with receivers throughout the route, durable and tough.
Safety
1. Landon Collins, Alabama
-Big, physical player with excellent awareness and play recognition skills. Diagnoses the run early and flies upfield to make the tackle. Displays good range in coverage, ball skills not the best at this time.
2. Damarious Randall, Arizona
-Fundamentally sound prospect with good range and ball skills. Great awareness as well. A bit undersized but it doesn't stop him from getting his hands dirty.
3. James Sample, Louisville
-Productive, durable prospect with great size and an all around solid game. Fluid athlete, moves well in any direction. Sees the action well, bursts out from his spot to get up the field to make tackles. Ball skills also a plus.
4. Ibraheim Campbell, Northwestern
-Great run-defending safety with an aggressive style and top notch run stopping skills.
5. Cody Prewitt, Mississippi
-Big safety with the physicality to deliver the big hit. Best against the run, struggles somewhat in coverage.
Inside Linebacker
1. Stephone Anthony, Clemson
-Prototypical size for the position, great instincts and awareness, stays in his gaps and completes his assignments. Follows the action well and shuffles through the traffic to make the tackle. Great all around game, if a little vulnerable in coverage.
2. Eric Kendricks, UCLA
-Slightly undersized but makes up for it with his awareness and agility to move fluidly all over the field. Locates the ball carrier quickly and gets after it with aggression.
3. Paul Dawson, TCU
-Doesn't provide the best measurements but has superb instincts and almost always takes his first step in the right direction. Excellent awareness and play recognition. Size can be a setback as he can get wiped out by larger blockers.
4. Denzel Perryman, Miami
-Another prospect that doesn't have the best measurables but his instincts and toughness are top notch. Sees the action well and shifts through the traffic quickly to make the play. Very active player. Height may be a liability in coverage, may be a two-down player.
5. Taiwan Jones, Michigan State
-Smart, three-down player with great size for the position. Adequate skills against the run and the pass. Sometimes gets caught up in the traffic and gets taken out of the play. Didn't test well.
Outside Linebacker
1. Dante Fowler, Jr., Florida
-Aggressive, physical and speedy edge rusher with relentless pursuit and violent hands. Explosive off the snap and can beat blockers with a variety of pass rush moves. Top edge rusher in the class.
2. Randy Gregory, Nebraska
-Naturally gifted athlete with excellent lateral agility and active hands to counter and fight through blocks to find the action. May be a bit on the lighter side at 235 lbs. and has had issues with failed drug tests. It's unclear how important football is to him.
3. Vic Beasley, Clemson
-Strong, explosive pass rusher with a solid all-around game. Active hands to fight off blocks and has the speed to bend the edge and get after the QB. Excellent balance and agility, size does sometimes get overwhelmed by larger linemen.
4. Shane Ray, Missouri
-Disruptive player, insanely quick first step off the snap, able to blow past blockers with his speed and pursue the ball carrier. Didn't measure up very well but has the skills to be a pure pass rusher at the next level.
5. Nate Orchard, Utah
-Excellent size, very productive player who led the nation in sacks in 2014. Leader on defense, doesn't do any one thing exceptionally well but has a well rounded game that projects positively to the next level.
Defensive End
1. Bud Dupree, Kentucky
-Versatile player that did a lot more than just rushing the passer while at Kentucky. Great size and speed for the position. Very active player with flexibility to line up in different spots.
2. Owamagbe Odighizuwa, UCLA
-Explosive, disruptive player with great balance and agility. Strong at the point of attack and relentless in pursuit. Sidelined with injuries at times but his skills are top notch and he should enjoy a very productive NFL career.
3. Preston Smith, Mississippi State
-Excellent size and natural pass rushing ability. Moves well laterally and displays a solid burst to get to the ball. Run defending skills could use some improvement and at times will get too high in his pad level allowing blockers to get their hands on him and move him away from the play.
4. Mario Edwards, Jr., Florida State
-Could either play end or tackle at the next level, has the skills and size for both. The effort is what teams will question. Has exceptional talent if a fire can be lit underneath him.
5. Markus Golden, Missouri
-High effort player with developing skill set. Solid quickness in every direction, pursues the action well. Might be a tad undersized for some schemes but should be able to produce at the next level.
Defensive Tackle
1. Leonard Williams, USC
-Excellent player with the versatility to play any position along the line. Big, strong, powerful player with plenty of quickness and lateral ability. Hard to defend with one man, a player teams have to gameplan for, seen by many as the top player overall in the draft.
2. Danny Shelton, Washington
-Huge, powerful player with immense strength, nearly impossible to block with just one player. Has adequate movement skills and shows a ton of effort in each play. His overall skill set is still progressing with his hand technique needing refinement, but shows all the skills of a dominant DT who can step in and produce from day one.
3. Malcolm Brown, Texas
-Possesses the size and athletic ability for the position. Has the versatility and agility to move around the line and make plays from different areas. His effort may not always be 100% and whichever team ends up with him will coach him up to play with more attitude and aggression.
4. Arik Armstead, Oregon
-Physically imposing player with a developing game. Plays with solid leverage for as tall as he is, changes direction well and can move quickly around the field. Violent hand technique with an average closing burst.
5. Eddie Goldman, Florida State
-Huge, space-eating defender with disruptive ability and tons of upside. Uses good technique and leverage, sustains his gap to open up space for teammates to make plays. Doesn't possess a quick burst and sometimes slow in shedding blocks.