Mack was one of the standouts at the Core 6 Showcase in Chicago in January where Carroll senior-to-be and AWP 7-on-7 teammate Justin Tranquill also turned heads.
Mack recently picked up his third verbal scholarship offer from Toledo, joining Cincinnati and Indiana.
“I have been to a few camps (this offseason), so it's been going really well,” Mack said.
The 6-foot-2, 208-pound wideout caught 57 passes for 805 yards and three touchdowns a season ago for the Knights, who struggled at times offensively with a young, inexperienced squad. But he still put up numbers and also played defensive back.
“It was a struggle, definitely,” said Mack as Bishop Luers went 2-10 after four consecutive state championships. “But we are going to be a lot older (this fall).”
Mack's visit to Michigan came about after assistant coach Curt Mallory contacted him on Twitter recently, inviting him to attend Saturday's home basketball game with Minnesota.
Mack had not had any contact with the Wolverines before the discussion with Mallory, and this will be his first visit to campus.
“It is going to be sweet,” Mack said.
Since the season ended, Mack has worked significantly on improving his precision and becoming a more consistent route runner and pass catcher. He already exhibits soft hands and the ability to time the apex of his jumps to soar over defenders to make catches.
By polishing up his game, he will become even better.
Perhaps the biggest factor in his junior season will be his size.
Last year, he played at a listed 6-foot-1, 198 pounds. He hopes to be at a healthy playing weight of 215 pounds when fall practice begins.
As Mack sits on three scholarship offers, plenty of other programs are showing interest. In addition to Michigan, Michigan State, Notre Dame, Tennessee and Missouri have been among those most in contact.
He visited South Bend for the Oklahoma and USC games a year ago and says Notre Dame and Michigan State are the two schools most in contact with him.
He also expects to camp at Notre Dame this summer.
“Last year I couldn't go to camp (there) because it was right before 7-on-7 Nationals,” Mack said. “But I am pretty interested (in Notre Dame).”
All college coaches who have spoken to Mack want him on offense at wide receiver.
While the interest continues to build, he is in no rush to make a decision.
“I am just taking it slow right now,” Mack said.