After when he arrived in Oakland four years ago, general manager Reggie McKenzie began with and last offseason.The early returns out of OTAs suggest McKenzie hit on another long-term building block in .The No. 4 overall pick has reportedly been the "", showing a veteran's savvine s in offseason practices.Alabama sources have told NFL Media Insider Ian Rapoport that they believed Cooper was the Willy Hernangomez Jersey best and most NFL-ready receiver the school has ever produced -- including .McKenzie, who cut his teeth in the ' front office, views Cooper as a bigger , per Rapoport.Carr's new No. 1 receiver is more than just a consolation prize after McKenzie his in free agency three months ago.Which other rookies have been generating buzz in OTAs and minicamps? Here is a rundown of 20 players from around the league:First-round wide receiver has inspired a since offseason practices began. The former University of Miami star has impre sed not only with his blazing speed, but also with his attitude and intelligence. After watching Dorsett the past month, beat writer Mike Chappell is convinced the rookie J.J. Redick Jersey will "."Before Davante Parker earlier this month, linebacker lauded the rookie wide receiver as "" who "goes and gets the ball wherever it is." has stood out in drills, but he's with the ' first-team offense.After spending last week's OTAs , wrapped up Thursday's practice running the first-team offense. Winston is fully expected to be the starter when training camp opens in late July.The have been thrilled with what they have seen from this spring. "He is deadly accurate," wide receivers coach Shawn Jefferson raved. "I am just giddy about his future going forward. ... ." second-round wide receiver mi Kira Lewis Jr. Jersey sed most of rookie camp and the first seven OTAs with a hamstring injury. The developmental project for next week's minicamp.While has nursed a hamstring injury of his own, second-round pick has seen time at three different receiver positions in OTAs. The monstrous wideouts are "going to be a ," said Carolina's secondary coach, Steve Wilks.Although has impre sed the , it's journeyman who is lining up opposite . have compared rookie running back to for his . offensive coordinator Greg Olson acknowledged that second-round pick has a as a rookie. Yeldon is when the season opens, according to the team's official website.Second-round tailback has taken advantage of 's absence, to quarterback . "I think as a runner he has great balance," Stafford said recently. "He's obviously a low-to-the-ground guy. He seems to hide pretty well behind there and he's got good vision. Out of the backfield, catching the ball, he's great. He's got great hands. He has a good feel for route running." director of player personnel Brian Ike Anigbogu Jersey Heimerdinger compared the drafting of defensive end to walking downstairs and under the tree. defensive coordinator Richard Smith has drawn comparisons between and All-Pro pa s rusher for their "."A "," cornerback is moonlighting at safety during OTAs. "He's done a solid job," defensive coordinator Rod Marinelli said. "He's smart. A big plus for us, it ." fourth-round safety has been fast-tracked, already mixing in with the first-team defense, while adding a to his responsibilities.With the injury to starter , the have working as the left tackle with the to get him more reps. Second-round safety has come in and " as he did every Saturday at Alabama," according to linebacker .The are preparing first-round offensive lineman for a jack Eric Bledsoe Jersey -of-all-trades role, trying him out at .With left tackle out for the season, the have settled on second-round pick as 's .Behemoth seventh-round rookie Trent Brown is working with the ' following Anthony Davis' . coach Rex Ryan is high on third-round guard . "He's looking like a 10-year veteran and he doesn't make mental mistakes, and he's an athletic guy," Ryan said. "When we took him, we ."The latest Podcast , and Conor Orr calls in for the debut of a new segment. Find more content on .