NFL Combine 2014: Day 4 risers and fallers

Quarterbacks, running backs and wide receivers took the field on Sunday for the second day of workouts (and fourth day overall) at the NFL Combine. Let's see which players had impressive outings and which ones raised more questions than they answered.

RISER: Brandin Cooks, WR, Oregon State

Cooks has always been known as a quick slot receiver, but on Sunday we found out exactly how quick. Cooks led all receivers with a 4.33 40-yard dash, a 3.81 20-yard shuttle and a 10.72 60-yard shuttle. He also looked good in drills, showing the sure-handedness that was evident on tape.

FALLER: De'Anthony Thomas, RB, Oregon

Thomas wowed fans at Oregon with his speed, and as a result was expected to be one of a few running backs that had a legitimate shot of running a sub-4.3 40. However, Thomas didn't live up to those expectations on Sunday, clocking a pedestrian 4.50 40 time. Combine that with his measurables (5-9, 174 pounds, 8 1/8" hands) and it's tough to see where Thomas fits in at the next level.

RISER: AJ McCarron, QB, Alabama

McCarron shone in the absence of marquee quarterbacks Teddy Bridgewater, Johnny Manziel and Derek Carr, all of which did not throw on Sunday. The Crimson Tide senior looked crisp on most of his passing drills, delivering accurate passes all over the field.

FALLER: Ka'Deem Carey, RB, Arizona

Carey's 4.70 40 time was slower than expected, and he struggled a bit in receiving drills.. Granted, Carey didn't have a reputation of being a speed demon like De'Anthony Thomas or a sure-handed weapon out of the backfield like Charles Sims, but he'll need to show some improvement at Arizona's Pro Day to alleviate any concerns about his speed or his hands.

RISER: Mike Evans, WR, Texas A&M

The 6-5, Evans wasn't much of a burner in college, but he showed surprising speed on Sunday with a 4.53 40. In addition, he looked extremely smooth ithe gauntlet and other receiving drills. He cemented his status as a top-15 pick, and could even wind up as a top-10 pick.

FALLER: Jarvis Landry, WR, LSU

Landry ran a 4.77 40, slowest of any wideout at the Combine. He then left the workout with a calf injury. Speed isn't necessarily a main characteristic of Landry, who thrives on tough catches over the middle, but it's still tough to ignore a time like that. In addition, his calf injury may be something to monitor as the draft nears.