USC added and subtracted from its verbal commitment list today and wound up with a 19-player recruiting class that, while might be lacking glitz, appeared to fill many of the Trojans’ immediate needs.

Defensive lineman Nick Perry of Detroit and defensive back T.J. Bryant of Florida supplied the Trojans with a signing-day surge after multiple-purpose standout Joe Adams backed off his verbal commitment and signed with Arkansas, his home-state school.

The Trojans class, which includes 10 linemen, could grow if, as expected, Lawndale Leuzinger linebacker Uona Kavienga announces this evening that he had signed with USC.

With most top programs having received commitments from 20 or more players, and the Trojans missing a quarterback and marquee running back, several recruiting experts had projected the Trojans’ class lower than in the previous five seasons under Coach Pete Carroll. USC’s classes were never ranked lower than third during that span.

The additions of Perry and Bryant to those already committed pushed the Trojans’ class to 10th nationally by Rivals.com and 13th by scout.com before Kavienga’s announcement.

Nevertheless, Carroll described it as “a championship class again.”

Carroll said the focus was on replacing linemen, especially on the offensive side.

“I think of this class as ‘The Big Class’ because of all the big guys,” Carroll said.

USC replenished its offensive line after losing four starters from last season’s team.

Offensive linemen Matt Kalil of Anaheim Servite High, Khaled Holmes of Santa Ana Mater Dei, Tyron Smith of Moreno Valley Rancho Verde and Daniel Campbell of Texas also signed letters of intent today. Matt Meyer graduated early from Stockton Lincoln High and is already attending classes at USC.

Tight end Blake Ayles of Orange Lutheran, receivers Brice Butler (Georgia) and D.J. Shoemate (Servite) and multiple-purpose threat Curtis McNeal of Venice were other offensive players who began faxing letters of intent at 7 a.m.

Perry and Bryant join a group of defensive players that includes linemen Wes Horton of Sherman Oaks Notre Dame, Armond Armstead of Elk Grove Pleasant Grove, Jurrell Casey of Long Beach Poly and Malik Jackson of Lake Balboa Birmingham, linebacker Maurice Simmons of Compton Dominguez, brother of former Trojan Melvin Simmons, and defensive backs Drew McAllister of Danville Monte Vista and Brian Baucham of West Torrance.

Safety Shane Horton, the older brother of signee Wes, transferred from Nevada Las Vegas in January. He will participate in spring practice but will not be eligible until 2009.

Carroll said that some parents from outside Southern California expressed concern about his conversations with NFL teams. Carroll spoke with the Atlanta Falcons and Washington Redskins last month.

“I think parents around the area are used to seeing it and handle it well and don’t worry about it,” Carroll said. “But out of the area, it did come up a few times. I don’t think it factored into any of the decisions by any of these guys.”

Carroll said Adams’ decision to sign with Arkansas was not entirely unexpected.

“We just knew it was going to be a struggle the whole time,” he said. “A kid really has to be strong about it to leave and know what he wants to do … at the end it just was too hard for him to leave and go away from home.”

gary.klein@latimes.com