Training The Right Way: The Making of Tough, Multi-Sport QB Mack Bartholomew | D1 Daily

Mack Bartholomew isn’t the quarterback everyone has been talking about — YET.

The Knoxville (Tenn.) Catholic junior is quietly becoming one of the more intriguing signal-callers in the region. A three-star prospect, a multi-year starter in one of Tennessee’s most physical divisions, and a player with multiple Division I scholarship offers, Mack is entering his senior season with momentum, and with the sense that his best football is still ahead.

Those who know him best believe that’s exactly what makes him dangerous.

“Mack’s a grinder,” one coach says. “He’s tough, competitive, and he keeps getting better.”

Between school workouts, multi-sport competition, and targeted performance training at D1 Training, Mack has taken a deliberate, no-frills approach to development. He’s not chasing attention. He’s chasing improvement.

His Quarterback DNA

Mack’s path hasn’t followed the traditional hype cycle. He comes from a family of fullbacks and linebackers but he chose the path of QB.  Always a great athlete, Mack had to learn the discipline, toughness, leadership, and knowledge to play at a high level.  Year after year, he puts in the work to have a chance to be an elite QB.   

That growth shows up on Friday nights. To date, Mack has more than 3,000 total yards and 28 touchdowns in two seasons as a starter.

He’s a quarterback who plays with an edge and a smile, standing tall in the pocket, extending plays when needed, and competing with toughness that feels more like a throwback than a trend. Teammates respond to him. Coaches love to coach him. And defenses have to account for him.

“The quarterbacks I admire — Baker Mayfield, Josh Allen, Tim Tebow — all play with toughness and moxy,” Mack says. “That’s what I want to play like.”

Choosing The Harder Path

Ahead of his sophomore season, Mack transferred to Knoxville Catholic — a program still working to establish itself in a demanding division. The move wasn’t about walking into a finished product. It was about competition and opportunity.

Mack didn’t arrive as the unquestioned starter. He earned the job through offseason work, command of the offense, and daily consistency in practice.

Mack working out at D1 Hardin Valley in Knoxville. (Photo: D1 Training)

The sophomore season was challenging. Knoxville Catholic finished with three wins, but internally, the program was building. Mack stayed steady, continued to lead, and kept developing — a trait coaches value at the quarterback position.

That progress showed up the following fall.

As a junior, Mack helped Knoxville Catholic double its win total to six, earn a playoff berth, and capture a road playoff victory, a meaningful step forward for the program. Mack’s growth from Year 1 to Year 2 as the starter reflected improved command, confidence, and competitiveness.

For evaluators, the trajectory matters.

Multi-Sport Toughness Still Matters

Part of Mack’s edge comes from basketball.

Mack continues to compete on the hardwood, and it’s a decision that hasn’t gone unnoticed by college coaches. The conditioning, spatial awareness, footwork, and competitive instincts all translate directly to quarterback play.

“Every coach I talk to likes that I play basketball,” Mack says. “They want guys who move well and compete.”

Rather than specializing early, Mack has leaned into being an athlete first. It’s a mindset that aligns closely with long-term quarterback development.

Training With Intent at D1

While Mack lifts daily with his school team, D1 Training plays a key role in sharpening the physical tools that allow him to play the game his way.

Mack Bartholomew had the opportunity to work out with Tim Tebow at D1 West Nashville in December 2024. (Photo: D1 Training)

“At D1, I focus on speed, footwork, and explosiveness,” Mack says. “I’m training to be more efficient and more durable, not just stronger.”

D1’s performance-based approach allows Mack to train year-round without breaking down his body. The goal isn’t flash. It’s repeatability, showing up confident when it matters most.

That balance is especially important for a quarterback who plays multiple sports and carries leadership responsibilities year-round.

Football Runs Deep, But This Is His Path

Athletics are part of Mack’s world, but they don’t define his ceiling.

His father, Will Bartholomew, founded D1 Training after playing fullback at the University of Tennessee. His uncle, Ben, also played fullback for the Vols. His older brother Ty is a linebacker at Vanderbilt, and his sister Nolyn was a scholarship soccer player at Tennessee.

Mack with his dad Will at the Manning Passing Academy in June 2025. (Photo: D1 Training)

Those experiences provide perspective not pressure.

“This journey is my own,” Mack says. “I’m focused on what I can control.”

A Sleeper With Something To Prove

With offers from multiple Division 1 programs, and growing interest from Power 4 schools, Mack enters his senior season with a clear mindset: keep working, keep competing, and let the film speak.

“I’m not chasing stats,” he says. “I’m trying to win a state championship and raise a trophy with my teammates.”

For college coaches still getting familiar with his name, Mack Bartholomew fits the profile of a rising star at quarterback. He’s tough, athletic, competitive, and still ascending.

He may be under the radar now. But not for long.