The Bears held the NFL version of a college orientation Thursday, welcoming more than 40 pro prospects to Halas Hall for the start of rookie minicamp.

The group consisted of eight draft picks, 10 undrafted free agents, six first-year Bears players and 23 unsigned rookies who will participate on a tryout basis.

Offensive tackle Ozzy Trapilo was selected by the Bears in the second round of the draft 13 days ago. But becoming a pro didn't really hit the Boston College product until Thursday.

"Seeing my locker was when it really sunk in," Trapilo told ChicagoBears.com.

Asked what was going through his mind when he arrived at Halas Hall, Trapilo said: "It's surreal. It's really here. I think this is kind of a defining moment. This is all real, this is all happening. These last few weeks have been hectic, but really solidifying it is getting here today."

The prospects posed for headshots and cycled through meetings with the athletic training, equipment, video, strength and high-performance staffs.

"It's been great, meeting the staff, getting to kind of feel my way around the building," said seventh-round pick Kyle Monangai, a running back from Rutgers. "It's a big facility, but it's been great. People are welcoming and I'm excited to work with them."

The NFL hopefuls entered Halas Hall through a hallway that's lined with the names and numbers of the 14 players who have had their jersey numbers retired by the Bears.

"That was super cool," Trapilo said. "What a great city, what a great history, great culture, great program. I'm super excited to be here."

"Just walking through that and seeing the legacy of the players, the greats that have played here, is special," Monangai added.

"That's legendary right there," said fifth-round selection Zah Frazier, a cornerback from Texas-San Antonio. "That's where you want your number to be."

The Bears will conduct non-contact practices Friday, Saturday and Sunday.

Asked what he hopes to display on the field, Trapilo said: "Dependability is something that you can demonstrate, just knowing what you're doing. And demonstrating your play style without that physical aspect. That's to come, but you can accomplish a lot still without that."

Monangai simply wants to show the Bears "that they made the right decision."

Here are the players who are scheduled to participate in the rookie minicamp:

Draft picks (8):

Colston Loveland, first-round tight end

Luther Burden III, second-round receiver

Ozzy Trapilo, second-round offensive tackle

Shemar Turner, second-round defensive end

Ruben Hyppolite II, fourth-round linebacker

Zah Frazier, fifth-round cornerback

Luke Newman, sixth-round guard

Kyle Monangai, seventh-round running back

Undrafted free agents (10):

Major Burns, LSU safety

Xavier Carlton, California defensive end

Power Echols, North Carolina linebacker

Luke Elkin, Iowa long snapper

Deion Hankins, Texas St. running back

Tysheem Johnson, Oregon safety

Jonathan Kim, Michigan State kicker

John Richardson, TCU receiver

Jereme Robinson, Kansas defensive end

Jahdae Walker, Texas A&M receiver

Bears first-year pros (6):

Theo Benedet, offensive tackle

John Jackson, receiver

Carl Jones Jr., linebacker

Jordan Murray, tight end

Austin Reed, quarterback

Joel Wilson, tight end

Unsigned rookies (23):

Bryan Addison, UCLA safety

Sheldon Arnold II, Central Florida safety

Michael Batton, Houston linebacker

Emmit Bohle, Arizona State offensive tackle

Bryquice Brown, Boston College cornerback

Reggie Brown, Tulane tight end

Matthew Downing, Elon quarterback

Thomas Gordon, Northwestern tight end

Isaiah Greene, Campbell cornerback

Christian Grubb, Portland State running back

Jeremiah Hunter, Washington receiver

Brayden Keim, BYU offensive tackle

Devin Kirkwood, UCLA cornerback

Vershon Lee, South Carolina offensive tackle

Jordan Mahoney, Arkansas State cornerback

Dominick Mazotti, Massachusetts-Amherst tight end

Vincent Murphy, Tulane center/guard

Cole Nelson, Virginia Tech defensive end

Nana Asare Osafo-Mensah, TCU defensive lineman

Giovanni Paez, LSU defensive tackle

Sebastian Pares, Eastern Illinois offensive lineman

Jeremiah Walker, Stephen F. Austin cornerback

Lachlan Wilson, California punter