Meet Our Coaches & Staff

Founder, Golden State Grind | Head Varsity Baseball Coach | Baseball Development Director

Coach Bill Duby is the founder of Golden State Grind and a longtime coach, program builder and player-development leader based in Concord, California.

His approach is built around a simple philosophy: development over hype.

For more than a decade, Duby has worked with youth and high school athletes, building programs centered on fundamentals, accountability, competition, baseball IQ, measurable progress and character. Golden State Grind has grown from that philosophy into a year-round development system serving players from their first baseball experiences through high school and the pursuit of college opportunities. 

COACHING & LEADERSHIP

Coach Duby serves as Head Varsity Baseball Coach at Mt. Diablo High School and directs baseball development programs in Concord. He has also held leadership roles with U.S. Baseball Academy and Stars and Stripes Baseball.

His experience spans youth baseball, high school baseball, camps, player evaluation, coach development, recruiting guidance, organizational leadership and year-round player development.

U.S. Baseball Academy currently lists Duby as director of its Concord summer baseball camp hosted at Golden State Grind. 

THE DEVELOPMENT PHILOSOPHY

Coach Duby believes winning matters—but development comes first.

His coaching system emphasizes:

FUNDAMENTALS • WORK ETHIC • ACCOUNTABILITY • BASEBALL IQ • COMPETITIVENESS • COACHABILITY • CHARACTER • MEASURABLE PROGRESS

Players are taught to understand the game, compete with purpose, respond to adversity and take responsibility for their own development.

The objective isn't simply to build better tournament teams.

It's to build players capable of succeeding at the next level.

ATHLETIC BACKGROUND

A graduate of Mt. Diablo High School in Concord, Duby was a four-sport varsity athlete competing in football, basketball, baseball and track & field.

He earned 10 varsity letters, received All-League and All-East Bay football recognition, competed in the North Coast Section track championships and continued his football career at Diablo Valley College before attending San Francisco State University. 

That multi-sport background continues to influence his development philosophy: build the athlete, develop the baseball player, prepare the person.

BUILDING THE PATHWAY

Today, Coach Duby's focus is building a complete development pathway for Northern California baseball players:

GRIND CAMPS | AGES 4–18

Introduction, fundamentals, competition and confidence.

DUBY BASEBALL | 8U–14U

Year-round youth development and preparation for high school.

GOLDEN STATE GRIND | 14U–18U

Advanced development, high school preparation, performance, recruiting and advancement.

The system emphasizes professional coaching, year-round development, objective evaluation and long-term player growth.

BUILT DIFFERENT. DEVELOPED DIFFERENT.

DEVELOPMENT OVER HYPE. EVERY TIME. 

Billy Duby is a former Division I right-handed pitcher and the founder of Duby Baseball, a premier baseball development organization based in the San Francisco Bay Area. Known for his elite playing background and sharp pitching IQ, Duby has quickly built a reputation as one of the top up-and-coming instructors and player development specialists in the region.

Billy’s baseball journey began at Miramonte High School in Orinda, California, where he earned widespread recognition in 2018, including:

• Diablo Athletic League MVP & Pitcher of the Year
• MaxPreps Miramonte Player of the Year
• Will Newton Memorial Award (for Character, Leadership, and Competitiveness)
• Cal-Hi Sports All-State and multiple NorCal Player of the Week honors

After high school, Duby pitched for Diablo Valley College (DVC), contributing to the Vikings’ staff during the 2020–2021 season. He then advanced to Western Kentucky University (WKU) and later to Belmont University in Nashville, Tennessee, where he completed his collegiate playing career.

Duby’s talents extended well beyond the college season. He competed in three seasons of the Florida Collegiate Summer League, where he was a standout performer. In 2023, he was selected to pitch in the prestigious National Alliance of College Summer Baseball Prospect Games, where he struck out all three batters he faced while touching 94 mph.

Later that same summer, Duby appeared for the Party Animals in their national tour against the viral Savannah Bananas, showcasing his skills in front of packed stadiums and massive online audiences.

Following his college career, Billy signed professionally with the Oakland Ballers of the Pioneer League, but was traded prior to the season to the Ottawa Titans of the Frontier League, where he made an immediate impact—earning All-Star honors in his rookie year.

In addition to his success on the field, Duby has consistently demonstrated a strong commitment to academics:

• Bachelor of Interdisciplinary Studies (Social & Behavioral Science),
  Certificate in Organizational Leadership – Western Kentucky University
• Associate of Arts in Communications & General Education – Diablo Valley College
• Missouri Valley Conference Commissioner’s Academic Excellence Award (2023–24)
• Dean’s List and Conference Academic Honors

He began graduate studies toward a Master’s in Sports Administration, which he has paused to pursue professional baseball.

Driven by his passion for player development, Billy founded Duby Baseball—a dynamic training program offering teams, lessons, camps, and athlete development plans for players of all ages. Built on the foundation of hard work, attention to detail, and mental toughness, Duby Baseball has quickly become a trusted name in Northern California baseball instruction.

From dominating on the mound to building the next generation of talent, Billy Duby’s influence continues to grow. His blend of professional experience, teaching ability, and competitive fire makes him one of the most respected young coaches in the game today.

Whether he's dialing up 94 on the radar gun, mentoring pitchers on mechanics, or leading a youth camp, Billy Duby brings elite-level energy, knowledge, and commitment to everything he does.

Check out Billy Duby online to see highlights, interviews, and coaching content that reflect his growing impact on the game.

Aaron Miles is a Major League Baseball veteran and the current Manager of the Oakland Ballers. 

Drafted by the Houston Astros, Aaron had a successful MLB career with the Chicago White Sox, Colorado Rockies, St. Louis Cardinals, Chicago Cubs, and Los Angeles Dodgers. Notably, he was part of two NCS championship teams and clinched a World Series title with the St. Louis Cardinals in 2006.

Known for his blue-collar work ethic, toughness, and fearlessness, Aaron’s grit extended beyond the baseball field. In 2000, during spring training with the Astros, Aaron's mental and physical resilience were tested when he was taken hostage by two gunmen at his hotel. After a tense standoff, Aaron wrestled one of the gunmen to the ground, allowing the police to subdue the situation.

Aaron retired from Major League Baseball in 2011 after playing one final season with the Los Angeles Dodgers. Over the course of his career, he maintained a .281 batting average and proved to be a clutch performer—leading the National League with a .357 batting average with runners on base in 2011.

Aaron's versatility, baseball intelligence, and mental approach to the game have made him an invaluable coach and mentor. He has played a key role in developing the baseball knowledge and on-field performance of Golden State Grind players. His insights and leadership continue to benefit the team, making him an essential resource for both players and staff.