COACHES

George Roberts
Dirtbags Coach and Instructor

George Roberts
Dirtbags Coach and Instructor
- From Los Angeles, California
- Army Iraq War Veteran
- Director of Armory Training Facility
- Has been coaching travel and high school baseball and softball for over 15 years
- Has coached over 100 players that have all signed and played baseball or softball in college
- Embodies true development and mental toughness with any athlete ages 8 to professional

Stevie Patino
Dirtbags Coach and Instructor

Stevie Patino
Dirtbags Coach and Instructor
Marine Veteran
Head Strength Trainer at Armory
Training Facility
Head Hitting coach at Armory Baseball Academy
6 years of coaching High School and travel baseball
Coach Stevie is a passionate and dedicated baseball coach with a strong focus on player development, discipline, and team culture. With experience as both a player and coach, he brings a competitive edge and a commitment to helping athletes reach their full potential on and off the field. Coach Stevie strives to build programs rooted in accountability, hard work, and love for the game.
Head Strength Trainer at Armory
Training Facility
Head Hitting coach at Armory Baseball Academy
6 years of coaching High School and travel baseball
Coach Stevie is a passionate and dedicated baseball coach with a strong focus on player development, discipline, and team culture. With experience as both a player and coach, he brings a competitive edge and a commitment to helping athletes reach their full potential on and off the field. Coach Stevie strives to build programs rooted in accountability, hard work, and love for the game.

Matt Cortez
Dirtbags Coach and Instructor

Bradley Zimmer
Major League Baseball Outfielder Hitting Coach

Bradley Zimmer
Major League Baseball Outfielder Hitting Coach
My name is Bradley Zimmer, and I’m a former Major League Baseball outfielder with a decade of professional experience, including time with the Cleveland Guardians, Toronto Blue Jays, Philadelphia Phillies, Los Angeles Dodgers, and Boston Red Sox. I also played Division I baseball at the University of San Francisco, was a first-round draft pick, and had the honor of representing Team USA.
While every hitting coach has their own philosophy, I’ve been fortunate to learn from some of the best hitting minds in the game, allowing me to train and compete in high-level environments. Those varying perspectives have shaped the way I see hitting and taught me how to simplify and communicate effectively with players at every level.
Whether you’re just getting started or have had years of experience, I focus on both the mechanics of the swing and the mental side of hitting. Using video analysis and side-by-side comparisons, we’ll break down your swing in detail, identify areas for improvement, and develop a personalized plan to help you build confidence, consistency, and results in the game.
My goal is to create a supportive, growth-minded environment where players can develop not only as athletes, but as confident individuals. Whether it’s building a strong foundation or fine-tuning advanced skills, I’m here to be a resource
While every hitting coach has their own philosophy, I’ve been fortunate to learn from some of the best hitting minds in the game, allowing me to train and compete in high-level environments. Those varying perspectives have shaped the way I see hitting and taught me how to simplify and communicate effectively with players at every level.
Whether you’re just getting started or have had years of experience, I focus on both the mechanics of the swing and the mental side of hitting. Using video analysis and side-by-side comparisons, we’ll break down your swing in detail, identify areas for improvement, and develop a personalized plan to help you build confidence, consistency, and results in the game.
My goal is to create a supportive, growth-minded environment where players can develop not only as athletes, but as confident individuals. Whether it’s building a strong foundation or fine-tuning advanced skills, I’m here to be a resource

Andre Nnebe
Hitting Coach

Andre Nnebe
Hitting Coach
“I am excited to continue helping hitters build a plan to reach that next level and improve mechanically, mentally, and most importantly where it counts on the field.
Having gone through Driveline Baseball’s hitting certification and youth development series I’ve become well versed in ways to help hitters of all ages find the best version of them self.
Former Division 1 Center Fielder (Santa Clara University) with 3 years of pro baseball experience in the Milwaukee Brewers organization.”
Having gone through Driveline Baseball’s hitting certification and youth development series I’ve become well versed in ways to help hitters of all ages find the best version of them self.
Former Division 1 Center Fielder (Santa Clara University) with 3 years of pro baseball experience in the Milwaukee Brewers organization.”

Mike Castenada
High School Coach

Mike Castenada
High School Coach

Marcus Mack
11u Coach and Hitting Coach

Marcus Mack
11u Coach and Hitting Coach