Thus far, the 6-foot-1 lead guard out of Detroit (Mich.) Country Day is living up to them. He's averaging 24 points, six rebounds and four assists per contest and his squad has an unblemished 7-0 record.
"I've been playing high school basketball for four years," McCallum said. "This is the year that I'm supposed to shine. I'm just trying to go out there and prove how bad I want to become a McDonald's All-American and play in the Jordan All-American game. "
"I'm trying to pick it up," he said of his play. "I think I'm playing really well and I'm going to try and keep it up. We have two games this weekend and then next weekend we have a really big game. We play Keith Appling and Pershing.
Already McCallum has faced DeShaun Thomas, Vander Blue and Brandon Dawson. Each game McCallum was named MVP and lead his team to a victory, including a 34-point effort against Thomas' Fort Myers (Ind.) Bishop Luers squad.
"I just know I have to bring it every night," the four-star prospect told Scout.com. "You're a senior out there. Everybody is watching you. So you have to try and bring something to the table."
McCallum contemplated signing during the early period, but instead opted to wait it out and evaluate the programs under consideration during the college season. At this point he's eliminated Oklahoma and is down to Arizona, UCLA, Florida and Detroit.
"Yeah," he said when asked if he was glad he didn't sign early. "I didn't really know how it was going to work. Waiting was good because I'm getting a real good feel for where I want to be. When I just know and feel that it's a fit then I'll know. I'm just evaluating more and it's helped [to wait].
"It's pretty much the same," he said of his recruitment. "It's the same schools as before. I've just been watching the teams play. I'm getting a good feel for all the teams and their style and everything. It really hasn't changed.
One of McCallum's biggest decisions is to decide if he wants to play for a high-major program or play for his dad at Detroit.
"Playing for my dad is still a possibility," he said. "He's been my coach my whole life. He's doing well at Detroit. They are 10-5 and he has some big games this weekend and hopefully he can get a win. They play Butler on Saturday, so that'll be huge."
McCallum, who doesn't have a timeframe on making his decision, isn't claming any leaders.
"Not really," he said when asked if anyone stood out. "I'm just pretty much showing every school the same amount of love."