New England Patriots rookie report

FOXBOROUGH, Mass. -- A quick rundown on impressions of New England Patriots draft picks from practice:

DT Malcom Brown (first round) -- It's always hard to tell much about players who play at the line of scrimmage in a non-pads practice, but he's been right in the mix as a result of veteran Alan Branch only reporting for mandatory minicamp and Sealver Siliga not yet fully cleared to participate. A good photo of him here from Patriots.com.

S Jordan Richards (second round) -- He joined the team last week after being forced to stay away because Stanford had yet to hold graduation ceremonies, but he's quickly immersed himself into the rotation. "It's a sense of urgency to go play football again. It's a new environment and I'm just trying to learn as much as I can as fast as I can," he said.

OLB Geneo Grissom (third round) -- With players not wearing numbers and the defense most often on the far field, he's been tough to identify on a consistent basis in the hybrid group of players.

DE Trey Flowers (fourth round) -- Similar to Grissom, it's been challenging to get a solid read on the front-seven defenders in practice as many of the players blend in together.

G Tre Jackson (fourth round) -- While he played mostly right guard at Florida State, the Patriots have been seeing how he looks on the left side as well, sometimes playing him next to starting left tackle Nate Solder. He is easier to spot on the field because of the brace he wears over his left knee.

G Shaq Mason (fourth round) -- A shorter, smaller lineman at 6-foot-1 and 300 pounds, he's getting quality repetitions, most recently at right guard. At one point in Tuesday's practice, both Mason and fellow rookie Jackson were paired as the guards on each side of center Bryan Stork.

LS Joe Cardona (fifth round) -- He is the only snapper in camp and was particularly busy Tuesday as part of the practice was dedicated to rushing the field-goal team on to the field in situations when the team didn't have a timeout to spare. He has generally been consistent with his delivery, although Tuesday there were a few higher-than-the-norm snaps.

LB Matthew Wells (sixth round) -- The speedy linebacker has caught our eye more on special teams than defense.

TE AJ Derby (sixth round) -- Haven't seen much of him in drills as Rob Gronkowski, Scott Chandler, Michael Hoomanawanui and Fred Davis are taking the majority of reps.

CB Darryl Roberts (seventh round) -- Roberts caught our eye Tuesday with tight coverage and a pass breakup over the middle, as he's getting a lot of quality reps on the left side.

OLB Xzavier Dickson (seventh round) -- Similar to Grissom and Flowers, it's been a challenge to get a read on many of the hybrid players without jersey numbers at practice.