SI's Top 64 Prospects in the 2015 NFL Draft

Leonard Williams — DE/DT, USC

Should he ever unlock his full potential, Williams has the skills to be one of the NFL's dominant defenders.

Marcus Mariota — QB, Oregon

Mariota joins Jameis Winston as the two top QBs in the draft, but his history playing in a spread offense makes some NFL teams hesitate.

Randy Gregory — DE/OLB, Nebraska

Once a near-lock to land in the top 10, Gregory threw his path to the NFL off course with a failed drug test at the combine.

Kevin White — WR, West Virginia

An enticing physical specimen who broke out in 2014, White is a smooth, gliding receiver with explosive top-end speed for his size.

Dante Fowler Jr. — DE, Florida

Unlike some of his edge-rushing counterparts, Fowler could be a fit in either a 3-4 or 4-3 scheme. There's a place for him on all 32 teams.

Jameis Winston — QB, Florida State

The former Heisman winner may go No. 1 in the draft, so why can't he crack the top 5 of our Big Board?

Amari Cooper — WR, Alabama

His competitors are exceptionally skilled, yet Cooper stands out as the receiver in this class most capable of making a substantial Week 1 impact.

Brandon Scherff — OT, Iowa

The latest Iowa product bound for a high draft pick, Scherff is the most fundamentally sound offensive lineman in this draft class.

DeVante Parker — WR, Louisville

Once Teddy Bridgewater's favorite target, Parker makes a strong case of his own to be the first player at his position off the board.

Vic Beasley — OLB, Clemson

Beasley has been labeled a tweener throughout his college career, but he's aware of that, and he's ready to line up wherever he's asked to.

Trae Waynes — CB, Michigan State

After a lightning-quick 40 at the combine, Waynes established himself as arguably the top cornerback in the draft.

La'el Collins — OT, LSU

Collins has the size and strength to be an NFL star, but will he play at guard or tackle?

Danny Shelton — DT, Washington

There's no doubt that Shelton will create a flood of problems for opposing offenses in the NFL.

Shaq Thompson — LB, Washington

Thompson is one of the draft's most versatile athletes, so much so that he was drafted by the Boston Red Sox back in 2012.

Landon Collins — S, Alabama

The NFL places a premium on defensive backs who can do what Collins can: help over the top and bring the hammer against the run.

Todd Gurley — RB, Georgia

Gurley made a habit of terrorizing SEC defenses, but the uncertainty surrounding his ACL injury is impossible to avoid.

Marcus Peters — CB, Washington

Peters will be one of the most heavily scrutinized prospects in the entire draft due to his midseason dismissal from Washington's program.

Shane Ray — DE/OLB, Missouri

Outside of Nebraska's Randy Gregory, there's no edge rusher in this draft class who's quicker off the snap than Ray.

Andrus Peat — OT, Stanford

The size, length and athleticism are all there for Peat to become a standout at left tackle, at least eventually.

P.J. Williams — CB, Florida State

Williams's draft stock will almost certainly take a tumble after his recent arrest for a DUI charge, the timing of which couldn't be worse.

Kevin Johnson — CB, Wake Forest

Wake Forest won a total of seven games in 2013 and ‘14, yet Johnson still shows up repeatedly on film making plays.

Melvin Gordon — RB, Wisconsin

In the right system, Gordon has the potential to transcend the iffy track record of Wisconsin backs drafted into the NFL in recent years.

Dorial Green-Beckham — WR, Missouri/Oklahoma

Green-Beckham could be the kind of pick that changes an entire offense for the better. He also could be the kind of pick that gets people fired.

Cameron Erving — G/C, Florida State

Rare is the lineman who has the quickness to hold his own at left tackle and the power to play center.

Malcom Brown — DT, Texas

A 320-pounder with quick feet and scheme versatility, Brown is a three-down lineman who can disrupt the pocket over and over again.

T.J. Clemmings — OT, Pittsburgh

Clemmings is incredibly raw, but with time and in the right system, he may very well be the best tackle out of this year's group.

Maxx Williams — TE, Minnesota

Williams could come off the board in Round 1 in large part because there is not another tight end who warrants such a high selection.

Benardrick McKinney — LB, Mississippi State

McKinney is the last defender fullbacks or tight ends want to see sprinting toward them in one-on-one situations.

Eric Kendricks — LB, UCLA

Don't be surprised if Kendricks is the first off-ball linebacker to hear his name called in Round 1.

Jake Fisher — OT, Oregon

The former tight end who protected Marcus Mariota's blind side for most of 2014 seems like an ideal fit for zone blocking teams.

Michael Bennett — DT, Ohio State

Bennett was an instrumental player in Ohio State’s title-winning defense, but his size raises some problems of projection.

Arik Armstead — DE, Oregon

Armstead's combination of a hulking frame and eye-popping athleticism has NFL teams drooling.

Devin Funchess — WR/TE, Michigan

Funchess can threaten a defense from the slot to the flex to the seam, but he'll have to play to his size before he can take over the NFL.

Denzel Perryman — LB, Miami

Perryman's skill set isn't for everyone, but he has 100-tackle potential for the team that does find a spot for him.

Eddie Goldman — DT, Florida State

Goldman will never be a stat creator; his primary role is to soak up blocks for his defensive teammates. He could become a premier run-stopper.

Bud Dupree — DE/OLB, Kentucky

Most people weren't entirely aware of Dupree's freakish athleticism until he showed up at the scouting combine and blew everyone away.

Ereck Flowers — OT, Miami

Flowers wants to bury any defender in his path, and he has the strength to do so in the run game.

Rashad Green — WR, Florida State

Greene set the school records for catches and receiving yards in a highly productive career for the Seminoles.

Paul Dawson — LB, TCU

At his best, Dawson is a quick and intense player with a lot of potential to become a half-field linebacker.

Jalen Collins — CB, LSU

Collins only made 10 starts at LSU, buried behind top talent, but he fits the cornerback prototype.

Jaelen Strong — WR, Arizona State

After shining through a less than stellar quarterback situation in college, Strong should thrive with an NFL passer.

Ameer Abdullah — RB, Nebraska

Abdullah led the Big Ten in rushing, but his smaller size could prevent him from becoming a three-down back.

Devin Smith — WR, Ohio State

Smith excelled at hauling in the deep passes for OSU, but he'll need to improve his route-running in the NFL.

Owamagbe Odighizuwa — DE, UCLA

The 6'3", 267-pound Odighizuwa is powerful and versatile, which will without doubt attract NFL teams.

Laken Tomlinson — G, Duke

Tomlinson is a high-character person with some real potential, but it may take a year or two before he's ready to deal with the talent of the NFL.

Carl Davis — DT, Iowa

When he is locked in, Davis can be as disruptive as just about any defensive lineman in this draft.

Nelson Agholor — WR, USC

His production bringing back punts in college may be what gets him on the field quickest in the NFL.

D.J. Humphries — OT, Florida

On paper, Humphries shapes up as a long-term answer at left tackle. Will he be able to stay healthy?

Jay Ajayi — RB, Boise State

In 2014, Ajayi became the only person in FBS history to amass 1,800 rushing yards and 500 receiving yards in the same season.

Preston Smith — DE, Mississippi State

There isn't a team in the NFL that wouldn't benefit from the versatility the 6'5", 271-pound Smith can bring to the field.

A.J. Cann — G, South Carolina

Cann is more or less everything a team could want in an NFL guard: durable, hard-working and solid in his technique.

Jordan Phillips — DT, Oklahoma

Phillips is one of the biggest defensive players available—only two defensive linemen topped Phillips' 329 pounds at the combine weigh-ins.

Tre' Jackson — G, Florida State

Jackson landed a first-team All-ACC nod in 2013, then kicked his game to the next level last year en route to unanimous All-America honors.

Brett Hundley — QB, UCLA

Hundley is a true dual-threat quarterback, but it would be a mistake to assume he can be a legit NFL starter right away.

Tyler Lockett — WR, Kansas State

The 5'10", 182-pound speedster opened some eyes at the combine, and he's one of the more intriguing second-level receivers in this class.

Nate Orchard — DE/OLB, Utah

There are always questions about one-year-wonder pass-rushers, and Orchard's tape presents other concerns.

Duke Johnson — RB, Miami

Johnson leaves Miami as the team's all-time leader in all-purpose yardage, proving he is one of the most versatile backs in this draft class.

Eli Harold — DE/OLB, Virginia

The Cavaliers won a grand total of 11 games in Harold's three years as a player, but he consistently improved over that time.

Phillip Dorsett — WR, Miami

The burner from Miami did not break Chris Johnson's 40-yard dash record, but his 4.33 mark at the combine proved that he can fly.

Cedric Ogbuehi — OT, Texas A&M

Ogbuehi's got the skill to follow his former classmates into the league as a first-round talent, though there are a few necessary fixes to be done.

Grady Jarrett — DT, Clemson

Debited as a draft prospect due to his size (6'1", 304), Jarrett has discovered a number of techniques that allow him to overcome his shortcomings.

Breshad Perriman — WR, Central Florida

The son of Brett Perriman, who caught 525 passes and gained over 6,500 yards for four different NFL teams, Breshad Perriman is a different player than his dad.

Henry Anderson — DE, Stanford

Anderson led the Cardinal in sacks (8.5) and tackles for loss (15) in 2014, a pretty impressive feat for a 6'6", 294-pound player.

Ronald Darby — CB, Florida State

A 2014 third-team All-ACC selection and '12 ACC Defensive Rookie of the Year, Darby suited up in every FSU game of his three college seasons.