BAYONNE -- Giants long snapper Zak DeOssie is still learning the names of the team's draft picks. But DeOssie didn't need a program to recognize first-round pick Evan Engram's signature attribute in the first Organized Team Activity (OTA) of the offseason on Monday.

"The first-rounder, Rookie No. 1, he's got speed for days," DeOssie said at the Newark Mentoring Movement golf outing at the Bayonne Golf Club on Monday.

Engram's speed - he ran a 4.42-second 40-yard dash at the NFL Scouting Combine in March - is a big reason the Giants used the 23rd pick in the draft on the 6-foot-3, 236-pound tight end. Engram's ability to attack the deep middle is expected to add a dimension to the Giants' offense. The early returns are encouraging on that front.

"Engram made a great catch today right down the seam," left guard Justin Pugh said. "I was like, 'OK, that's why we got him in the first round.'"

Pugh said Engram and the rest of the rookie class are "like deer caught in the headlights," which is expected at this point of the offseason. But even as the newcomers' heads are spinning, they have impressed their veteran teammates.

"These guys are doing well," said DeOssie, who is entering his 11th season. "They're in there studying hard, they're doing the rookie program and they're eager to contribute. These kids are different from when I came in. They know what to expect. They're educated. They're ready to do everything they can to do to be a part of the team in hopes of playing for a long time."

It's not just the rookies who are getting up to speed. Monday was the first time the Giants' free-agent acquisitions participated in a full-team practice. There are high expectations for the group, which is led by six-time Pro Bowl wide receiver Brandon Marshall.

"It's Brandon Marshall, so you look at him and you revere him," DeOssie said. "He's one of the better receivers to play the game. That being said, he handles himself like the consummate pro. He shows up early, he leaves late, he works his tail off. It's good to have another vet in the room who knows how to go about the business the right way and people are following suit."

Dan Duggan may be reached at dduggan@njadvancemedia.com. Follow him on Twitter @DDuggan21. Find our Giants coverage on Facebook.