In addition to NC State and Texas Tech, McCallister, a 6-foot-5, 203-pound defensive end, has collected offers from East Carolina, North Carolina, South Carolina, and Wake Forest.
Joe Robinson, UNC's defensive line coach, visited West Forsyth on Tuesday.
"I really liked him," Snow said. "He and I watched tape together. He compared [McCallister] to a lot of his players in the past – ‘He looks like this guy' or ‘He looks like that guy.' He told me for him, [McCallister] didn't have to weigh unbelievable amounts of weight. He's looking for athletes that can run and Alex can do that."
According to Snow, Robinson returned to UNC that evening, watched the film with Butch Davis, and then called Snow to offer McCallister a scholarship.
McCallister recently transferred into West Forsyth from Winston-Salem (N.C.) R.J. Reynolds.
"When he got here a month ago, him, his mom, and I sat down," Snow said. "I said here's what West Forsyth does for our players: We're going to put your highlight together [and] we're going to give it to people. In turn, you're going to work hard and you're going to do what we're going to ask you to do.
"We've done our part and he's done his part."
That has resulted in the recruiting attention McCallister is receiving.
"He has a tremendous, tremendous upside," Snow said. "First of all, he's an unbelievable athlete… He has a 7-2 wing span. At the Shrine Bowl Combine, he ran a 4.23 in the pro shuttle and that is the second time he's ever ran it… He also had a 38-inch vertical jump, but they disqualified him for some reason. He's just an unbelievable athlete and good student."
Officially, McCallister registered a 32.3-inch vertical jump at the Shrine Bowl Combine, to go along with a 4.9-second 40-yard dash.
"I had a recruiter call me yesterday and he told me the top recruit in Virginia is a defensive lineman," Snow said. "He said, ‘In my mind he does not compare to Alex McCallister.'"
Snow – and McCallister – recognize there remains a lot of work to do.
"When it comes to the weight room, that hasn't really been in his repertoire – and he'll tell you that," Snow said. "Now, over the last month, he has not missed a workout. He's here three days a week working his butt off. But before the last month, I don't think he entered through the doors of the weight room very much.
"But I have the tape to prove it, he is so explosive. There's a clip where he takes the offensive tackle and just blows him up and this tackle probably weighs about 285-290 pounds.
Relative to that, McCallister's weight is less than ideal for a 6-foot-5 prospect.
"I firmly believe he has the body to do it," Snow said. "It's just doing it. He's never done it… I firmly believe by August, he'll weight 220 [pounds], because he's going to do what he's supposed to do."
At the end of May, Snow and McCallister are going to meet again.
"We're going to draw up a plan of what he's going to do at the end of the summer," Snow said. "What he's not going to do at the end of the summer… So right now, I don't know where he's going to go, who he's going to visit, and he doesn't know. He might say ‘I like these guys' and ‘I like those guys,' but like them and go to the school for four years are two different things."
The instant "fame" has created a level of uncertainty with any sort of commitment timeline for McCallister.
"Committing early, I don't think that's going to be something he's going to do, unless he just falls in love," Snow said. "But he has told me it's either going to be before August 1 or after his season is over with, because he said ‘Coach, I don't want our season to be left back because of all this stuff.'"