The Tar Heel defense, which allowed just 18 goals in 24 games, went largely unheralded as Carrieri, Michael Bucy, Caleb Norkus and Logan Pause paced a squad that scored more goals than any other in school history.
Since then, Bucy graduated, Carrieri and Norkus were drafted into Major League Soccer, and Pause tore the meniscus in his left knee.
The Tar Heels lost 78 percent of their goals from a 2000 squad that lost to Indiana in the quarterfinals of the NCAA Tournament. Newcomers will likely play at key offensive positions. Yet the team was still picked as the ACC's preseason No. 1 and was ranked No. 5 nationally in the preseason.
And the defensive unit that is often forgotten is a large reason why UNC has a chance of repeating as the conference's top team.
"Last year, we won differently than I think we're going to win this year," senior defender Chris Leitch said. "Hopefully it'll be the same mentality. Hopefully we'll find a way to win just like we did last year.
"Hopefully that'll be one thing that we carry over to this year, but we're going to have to do it a little differently."
The Tar Heels will again have defenders Leitch, Danny Jackson and David Stokes and goalkeeper Michael Ueltschey guarding the back third. They will lend the team much-needed stability after the loss of such a large chunk of last year's offense.
With Pause, an attacking midfielder, out until at least October, UNC coach Elmar Bolowich will continue to shuffle the lineup around, trying to find the right mix in the center of the field.
Senior Noz Yamauchi will play on the left flank, while Matt Crawford, Mike Gell, Sean McGinty, Tim Merritt and Grant Porter will all share time filling the attacking midfielder, defending midfielder and right flank slots.