After six weeks of pro days, the football world is all systems go for the 2015 NFL Draft.

In that time, coaches, scouts and front offices dug deeper into the evaluation process, and naturally there were some prospects that launched up the boards. NFL Media draft expert Mike Mayock identified those players who, in his view, did just that and listed the top five risers in the upcoming draft, which begins April 30 in Chicago.

WR Nelson Agholor, USC
Mayock's take: "I think at the beginning of the process he was perceived as kind of mid-to-late second round solid wideout. And the more the coaches have gotten involved with the evaluation, they see a kid that can play inside, he can play outside, he's a devastating punt returner, and apparently they love him in the meeting room -- great on the board and a hard worker. I think he could go late [first round], but he's a top 40 pick."

DT Mario Edwards, Florida State
Mayock's take: "Back in August, he was over 300 pounds. At the combine, 279 -- 272 at his pro day. Quick. Now he looks like a base defensive end who can kick inside on sub-packages. That gets some teams excited."

WR Breshad Perriman, Central Florida
Mayock's take: "Now this kid was kind of a mid-to-late second round [pick] until he ran a 4.25 [40-yard dash]. He doesn't play to 4.25, but I like his game. I like his upside. He's a top 20 pick."

LB Bud Dupree, Kentucky
Mayock's take: "The tape is inconsistent, but again as coaches get involved, they want to work with this piece of clay. He's got everything you want to become a Pro Bowl edge rusher except consistency."

FS Damarious Randall, Arizona State
Mayock's take: "Kind of an afterthought when the process began. He is the best man cover guy at the safety position. Don't be surprised if he goes in the second round."