With the 2015 NFL draft approaching, SI assembled its own big board of the players who deserve to be selected in the first two rounds.

By Chris Burke & Doug Farrar
March 30, 2015

The 2015 NFL draft is just days away, and as teams finalize their player rankings and weigh their positions of need, SI's Chris Burke and Doug Farrar have assembled their own definitive Big Board. The SI 64 uses tape study to define the best prospects in this class and details the strengths and weaknesses that explain why they're slotted as such. Click on each player's name to read his full scouting report, along with a comparable NFL player and game tape from Draft Breakdown.

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64
Ronald Darby
CB, Florida State
 
63
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. VIDEO: Scouting Stanford's Henry Anderson
62
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. VIDEO: Scouting Central Florida's Breshad Perriman
61
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. VIDEO: Scouting Clemson's Grady Jarrett
60
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. VIDEO: Scouting Texas A&M's Cedric Ogbuehi
59
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. VIDEO: Scouting Miami's Phillip Dorsett
58
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. VIDEO: Scouting Virginia's Eli Harold
57
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. VIDEO: Scouting Miami's Duke Johnson
56
Nate Orchard
DE/OLB, Utah
There are always questions about one-year-wonder pass-rushers, and Orchard's tape presents other concerns. VIDEO: Scouting Utah's Nate Orchard
55
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. VIDEO: Scouting Kansas State's Tyler Lockett
54
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. VIDEO: Scouting UCLA's Brett Hundley
53
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. VIDEO: Scouting Florida State's Tre' Jackson
52
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. VIDEO: Scouting Oklahoma's Jordan Phillips
51
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. VIDEO: Scouting South Carolina's A.J. Cann
50
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. VIDEO: Scouting Mississippi State's Preston Smith
49
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. VIDEO: Scouting Boise State's Jay Ajayi
48
OT, Florida
On paper, Humphries shapes up as a long-term answer at left tackle. Will he be able to stay healthy? VIDEO: Scouting Florida's D.J. Humphries
47
Nelson Agholor
WR, USC
His production bringing back punts in college may be what gets him on the field quickest in the NFL. VIDEO: Scouting USC's Nelson Agholor
46
Carl Davis
DT, Iowa
When he is locked in, Davis can be as disruptive as just about any defensive lineman in this draft. VIDEO: Scouting Iowa's Carl Davis
45
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. VIDEO: Scouting Duke's Laken Tomlinson
44
Owamagbe Odighizuwa
DE, UCLA
The 6'3", 267-pound Odighizuwa is powerful and versatile, which will without doubt attract NFL teams. VIDEO: Scouting UCLA's Owamagbe Odighizuwa
43
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. VIDEO: Scouting Ohio State's Devin Smith
42
Ameer Abdullah
RB, Nebraska
Abdullah led the Big Ten in rushing, but his smaller size could prevent him from becoming a three-down back. VIDEO: Scouting Nebraska's Ameer Abdullah
41
Jaelen Strong
WR, Arizona State
After shining through a less than stellar quarterback situation in college, Strong should thrive with an NFL passer. VIDEO: Scouting Arizona State's Jaelen Strong
40
Jalen Collins
CB, LSU
Collins only made 10 starts at LSU, buried behind top talent, but he fits the cornerback prototype. VIDEO: Scouting LSU's Jalen Collins
39
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. VIDEO: Scouting TCU's Paul Dawson
38
Rashad Greene
WR, Florida State
Greene set the school records for catches and receiving yards in a highly productive career for the Seminoles. VIDEO: Scouting Florida State's Rashad Greene
37
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. VIDEO: Scouting Miami's Ereck Flowers
36
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. VIDEO: Scouting Kentucky's Bud Dupree
35
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. VIDEO: Scouting Florida State's Eddie Goldman
34
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. VIDEO: Scouting Miami's Denzel Perryman
33
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. VIDEO: Scouting Michigan's Devin Funchess
32
Arik Armstead
DE, Oregon
Armstead's combination of a hulking frame and eye-popping athleticism has NFL teams drooling. VIDEO: Scouting Oregon's Arik Armstead
31
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. VIDEO: Scouting Ohio State's Michael Bennett
30
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. VIDEO: Scouting Oregon's Jake Fisher
29
Eric Kendricks
LB, UCLA
Don't be surprised if Kendricks is the first off-ball linebacker to hear his name called in Round 1. VIDEO: Scouting UCLA's Eric Kendricks
28
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. VIDEO: Scouting Mississippi State's Benardrick McKinney
27
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. VIDEO: Scouting Minnesota's Maxx Williams
26
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. VIDEO: Scouting Pittsburgh's T.J. Clemmings
25
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. VIDEO: Scouting Texas's Malcom Brown
24
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. VIDEO: Scouting Florida State's Cameron Erving
23
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. VIDEO: Scouting Missouri/Oklahoma's Dorial Green-Beckham
22
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. VIDEO: Scouting Wisconsin's Melvin Gordon
21
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. VIDEO: Scouting Wake Forest's Kevin Johnson
20
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. VIDEO: Scouting Florida State's P.J. Williams
19
Andrus Peat
OT, Stanford
The size, length and athleticism are all there for Peat to become a standout at left tackle, at least eventually. VIDEO: Scouting Stanford's Andrus Peat
18
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. VIDEO: Scouting Missouri's Shane Ray
17
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. VIDEO: Scouting Washington's Marcus Peters
16
Todd Gurley
RB, Georgia
Gurley made a habit of terrorizing SEC defenses, but the uncertainty surrounding his ACL injury is impossible to avoid. VIDEO: Scouting Georgia's Todd Gurley
15
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. VIDEO: Scouting Alabama's Landon Collins
14
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. VIDEO: Scouting Washington's Shaq Thompson
13
Danny Shelton
DT, Washington
There's no doubt that Shelton will create a flood of problems for opposing offenses in the NFL. VIDEO: Scouting Washington's Danny Shelton
12
La'el Collins
OT, LSU
Collins has the size and strength to be an NFL star, but will he play at guard or tackle? VIDEO: Scouting LSU's La'el Collins
11
Trae Waynes
CB, Michigan State
After a lightning-quick 40 at the combine, Waynes established himself as arguably the top cornerback in the draft. VIDEO: Scouting Michigan State's Trae Waynes
10
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. VIDEO: Scouting Clemson's Vic Beasley
9
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. VIDEO: Scouting Louisville's DeVante Parker
8
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. VIDEO: Scouting Iowa's Brandon Scherff
7
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. VIDEO: Scouting Alabama's Amari Cooper
6
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? VIDEO: Scouting Florida State's Jameis Winston
5
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. VIDEO: Scouting Florida's Dante Fowler Jr.
4
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. VIDEO: Scouting West Virginia's Kevin White
3
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. VIDEO: Scouting Nebraska's Randy Gregory
2
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. VIDEO: Scouting Oregon's Marcus Mariota
1
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. VIDEO: Scouting USC's Leonard Williams

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