NFL Mock Draft 2015: 1st-Round Projections for Top Prospects After Combine Day 4

It's always exciting when an NFL team selects a playmaker in the first round of the draft. Fans get an exciting glimpse of the quarterback who shows the potential to lead the franchise to the big dance, the wide receiver whose game-breaking speed will propel the offense to new heights or the running back who can control the pace of games with his punishing running style.

We received a peek at the best players those positions have to offer during Saturday's workouts at the scouting combine.

Before the combine, the only way to evaluate these prospects was watching as much of their available college tape as possible. Now, we have a better idea of what they all bring to the table after getting an up-close look at their technique and recorded measurements of their speed, agility and strength. Rest assured, big boards are already being altered.

So, which of these players impressed enough to work their way toward the top of mock drafts? Here's an updated look at the first round following the combine's Day 4 action.

Pick	Team	Selection
1	Tampa Bay Buccaneers	Jameis Winston, QB, Florida State
2	Tennessee Titans	Marcus Mariota, QB, Oregon
3	Jacksonville Jaguars	Leonard Williams, DT, USC
4	Oakland Raiders	Kevin White, WR, West Virginia
5	Washington Redskins	Randy Gregory, DE, Nebraska
6	New York Jets	Dante Fowler, OLB, Florida
7	Chicago Bears	Danny Shelton, DT, Washington
8	Atlanta Falcons	Shane Ray, DE, Missouri
9	New York Giants	Brandon Scherff, OT, Iowa
10	St. Louis Rams	Amari Cooper, WR, Alabama
11	Minnesota Vikings	DeVante Parker, WR, Louisville
12	Cleveland Browns	La'el Collins, OT, LSU
13	New Orleans Saints	Vic Beasley, OLB, Clemson
14	Miami Dolphins	Trae Waynes, CB, Michigan State
15	San Francisco 49ers	Jaelen Strong, WR, Arizona State
16	Houston Texans	Landon Collins, S, Alabama
17	San Diego Chargers	T.J. Clemmings, OT, Pittsburgh
18	Kansas City Chiefs	Dorial Green-Beckham, WR, Oklahoma
19	Cleveland Browns (via Buffalo)	Bud Dupree, DE, Kentucky
20	Philadelphia Eagles	Marcus Peters, CB, Washington
21	Cincinnati Bengals	Shaq Thompson, OLB, Washington
22	Pittsburgh Steelers	P.J. Williams, CB, Florida State
23	Detroit Lions	Malcom Brown, DT, Texas
24	Arizona Cardinals	Melvin Gordon, RB, Wisconsin
25	Carolina Panthers	Andrus Peat, OT, Stanford
26	Baltimore Ravens	Jalen Collins, CB, LSU
27	Dallas Cowboys	Jordan Phillips, DT, Oklahoma
28	Denver Broncos	Eddie Goldman, DT, Florida State
29	Indianapolis Colts	Todd Gurley, RB, Georgia
30	Green Bay Packers	Eric Kendricks, ILB, UCLA
31	Seattle Seahawks	Sammie Coates, WR, Auburn
32	New England Patriots	Ereck Flowers, OT, Miami

Analyzing Notable Day 4 Performances

During Saturday's workouts, some prospects put forth great efforts and will be highly rewarded once the draft rolls around. Most of these performers were already shoo-ins to be selected in the draft's first round, but many may hear their names called sooner than originally anticipated.

Here's a look at a handful of prospects who really stood out on Saturday and where they are likely to land on April 30.

1. Tampa Bay Buccaneers: Jameis Winston, QB, Florida State

There were whispers regarding the Buccaneers favoring Jameis Winston leading up to the scouting combine. Well, the Florida State product certainly helped his case to go No. 1 overall during Saturday's workouts. He may not have dazzled with his 40-yard dash time of 4.97 seconds, but he excelled in practically every other drill.

Winston wasn't flustered under the bright lights at Lucas Oil Stadium, appearing confident and throwing crisp, well-placed balls. He displayed great velocity on some passes, nice touch on others and a very accurate deep ball. Sure, there are still questions about his character, but Winston absolutely performed like a prospect worthy of No. 1 overall consideration on Saturday.

2. Tennessee Titans: Marcus Mariota, QB, Oregon

Joe Robbins/Getty Images

The Titans' draft decision just became more difficult. The team needs help along the defensive line, and there is a great prospect ripe for the picking in Leonard Williams. However, selecting a quarterback with game-changing ability is certainly alluring. Marcus Mariota showed he is exactly that on Saturday.

The Oregon product recorded the fastest time of all quarterbacks in the 40-yard dash, running a solid 4.52 seconds. A big concern for Mariota was his ability to make the required NFL throws after spending time in a non-traditional offense with the Ducks. He showed a good throwing motion, nice accuracy, a good deep ball and consistency during Day 4 drills. He may be too difficult to pass up at No. 2 overall.

4. Oakland Raiders: Kevin White, WR, West Virginia

Kevin White may be the biggest freak in the draft. At 6'3" and 215 pounds, he was still able to run the 40-yard dash in a blazing 4.35 seconds. Daniel Jeremiah of NFL Media tweeted his praise for the receiver soon after the run:

Not only is White quick, but he showcased his strength on Friday night, posting 23 reps on the bench press. Adding to his spectacular showing, White was extremely fluid in positional drills, running a clean gauntlet and displaying a great blend of fluidity, acceleration and soft hands. That's the combination that will make him the first wide receiver selected this year.

10. St. Louis Rams: Amari Cooper, WR, Alabama

David J. Phillip/Associated Press

Amari Cooper may not have put up gaudy workout numbers like White, but he did exactly what was expected of him. A 40-yard dash time of 4.42 seconds is nothing to sneeze at, and he displayed a good mix of acceleration and top-end speed. However, where he really flourished was in positional drills.

Cooper was already known to be a very polished prospect, running crisp routes and making tough catches look easy. He proved why he was routinely analyzed that way on Saturday. Here's what Bleacher Report's Matt Bowen had to say:

The Rams have a solid receiving corps, but adding Cooper to the mix would give the team a true No. 1 option for years to come.

31. Seattle Seahawks: Sammie Coates, WR, Auburn

David J. Phillip/Associated Press

Auburn wide receiver Sammie Coates was expected to be one of the combine's workout warriors, and he proved to be exactly that on Saturday. He ran a solid 4.43-second 40-yard dash and was a top performer in the bench press, vertical jump and broad jump. While that was all good, one of his biggest knocks haunted him during positional drills, via College Football 24/7:

Aside from some drops, Coates ran a nice gauntlet, looking very agile in the process. His size (6'1" and 212 pounds), speed, power and athleticism can't be coached, but his reliability as a receiver can. Taking him late in the first round and developing his skill set will be very intriguing for teams in need of a wide receiver.

All player measurements and results courtesy of NFL.com's results tracker.