The NFL Combine is now in the books, and more than 300 of the nation’s top NFL Draft prospects have finished making their first impressions on all 32 NFL organizations both on and off the field.

The combine is far from the final step in the draft process — there are still on-campus pro days and private workouts and months of speculation to come before the draft in late April — but it is a giant step nonetheless.

Every NFL team is in attendance. There’s nowhere to hide from a bad showing, and although there are opportunities in the future to change a player’s perception nothing will alter his draft stock as much as the combine.

Of the 68 former SEC stars in attendance, most were able to participate in workouts and interviews, and almost all found their draft stock altered during the course of the week. Here’s a rundown of whose stock was raised or dropped the most during the course of the week in Indianapolis:

STOCK SOARING

Bud Dupree, DE/LB, Kentucky: Dupree was already projected to be a first round selection as a player with experience playing both defensive end and standing outside linebacker, but his combine workout cemented his first-round status and may have vaulted him into the top 10 picks range. Dupree measured in at 6-foot-4 and 269 pounds, but also ran an impressive 4.56 40-yard dash and displayed a 42-inch vertical leap, which at that size is downright amazing. A four-year starter at Kentucky who led the SEC in career sacks at the end of last season, Dupree did more than any other SEC alum to help his draft stock at this year’s combine, even if it seemed his stock couldn’t go any higher.

STOCK UP

La’el Collins, OT, LSU: Also projected to be a first-round pick entering the combine, Collins cemented himself as one of the best tackle prospects in the draft with a fantastic workout on Friday, ending questions surrounding his athleticism and the potential need to move him inside to guard at the NFL level. His 5.12 second 40-yard dash impressed scouts and exceeded expectations entering the week, as did his footwork in position drills. As College Football 24/7’s Mike Huguenin put it, “Everyone knows that the big money goes to left tackles. Collins kept himself in line for the big money.”

Landon Collins, S, Alabama: Collins was among the best defensive backs in college football last season and entered the combine as the consensus top safety in this year’s draft class. He cemented that status with a strong workout on Monday. NFL Network draft analyst Mike Mayock called Collins “a Coke machine with a head on top,” so you can imagine how pleased scouts were to see that physically punishing Coke machine run a 4.53 second 40-yard dash, ranking in the top 5 among safeties.

Chris Conley, WR, Georgia: The standout Georgia receiver was buried under a heap of more highly touted wideouts in this year’s draft class, and while he may not be elevating himself into the early rounds of the draft he’s definitely earned himself some name recognition as a freakish athlete. His 4.35 second 40-yard dash was among the best times posted by a wideout, as were his insane 45-inch vertical leap (a new combine record) and his 139-inch broad jump (second in the combine to a guy who set an Olympic record with his jump).

Senquez Golson, CB, Ole Miss: The undersized Ole Miss corner proved his 10-interception season last fall was no fluke, and he did plenty to show why his lack of height won’t hold him back at the NFL level as some suspect. Mayock ranted and raved about Golson’s instincts when playing the ball in the air, and the unanimous All-American showed off hands as good as most wideouts in attendance when progressing through drills. His 4.46 second 40-yard dash was among the 10 fastest run by a defensive back even though Golson was sick last week on the eve of the combine, and his 15 reps on the bench press were sensational considering the 225-pound weight is 49 pounds heavier than Golson himself.

Preston Smith, DE, Mississippi State: Smith raised his stock in a similar manner to Dupree, but to a lesser degree. The Bulldogs’ star defensive end made a name for himself at the Senior Bowl in January and followed up that performance by posting a 40 time and a vertical leap both ranking in the top 3 among full-time defensive linemen at the combine. And according to the Jackson Clarion-Ledger, his 40 time was a mere four-hundreths of a second slower than former teammate and tailback prospect Josh Robinson, which says a lot about Smith’s physical capabilities.

STOCK DOWN

Sammie Coates, WR, Auburn: There’s no questioning Coates abilities to make plays down the field, but he’s faced questions about how complete a player he is, and he was shaky in responding to those questions when progressing through workouts in Indy. His 40 time of 4.43 seconds wasn’t even in the top 10 among wideouts in attendance, and his 3-cone drill time ranked 15th among players at the position, indicating that for at least one day his speed and ability to change direction weren’t at an elite level. He did lead all wideouts on the bench press, but he’ll need to do more at Auburn’s pro day to show he can run every route on the passing tree and can hold onto the ball consistently.

Todd Gurley, RB, Georgia: For whatever reason, Gurley did not allow NFL teams to look at his surgically repaired knee while in attendance at the combine, which understandably left a few scouts and general managers skeptical of how his knee is progressing. Many draft experts said it’s unusual for Gurley to not let teams look at his knee as it recovers from a torn ACL suffered last fall, and it’s likely he’ll let teams examine his knee at Georgia’s pro day or any private visits he makes, but it certainly didn’t help his draft stock to keep the knee under wraps (pun intended).

Leon Orr, DL, Florida: Orr already enters the draft process with a red-flag beside his name after he was kicked off Florida’s team last fall by then-coach Will Muschamp after a dispute regarding Orr’s absence from the starting lineup for a game at Vanderbilt. He did not do a great job of addressing the issue at the combine, explaining it away as a “communication lapse,” according to College Football 24/7’s Bryan Fischer. Per SBNation’s Big Blue View, Orr was great in workouts but appeared stiff in position drills, which didn’t do his draft stock any favors either.

Cody Prewitt, S, Ole Miss: Prewitt was an All-American two years ago and remained one of the SEC’s top safeties last season, but his workout on Monday left scouts wanting more. He was only able to complete 11 reps on the bench press, which might have something to do with a shoulder injury suffered late last season although Prewitt would not admit to that. His first 40 time of 4.6 seconds was adequate, and although his second 40 time of 4.7 seconds was dropped, he still drew plenty of criticism for his form on that trial, which he’ll need to overcome at the Ole Miss pro day.