Meet the team

Student-Athlete | Youth Baseball Coach
Pitcher • Catcher • Utility Player

Aaron Hernandez is a dedicated 11th-grade student-athlete and versatile baseball player with a primary focus as a pitcher and catcher. His journey began in Little League, where he developed a passion for the game and steadily grew into a well-rounded, high-level competitor. Known for his strong fundamentals, understanding of pitching mechanics, and game strategy, Aaron continues to refine his skills and elevate his performance. One of his proudest moments to date is hitting his first home run—a milestone in his growth as a player—and he recently celebrated hitting his second home run this year 2025. 

In addition to his playing career, Aaron is also a committed youth baseball coach, affectionately known as Coach “A” by his players. He works with children ages 4–10, emphasizing fundamentals, proper technique, and building a love for the game. His coaching approach focuses on developing young athletes’ confidence and creating a strong foundation for their future in baseball.

Achievements:

Offensive Player of the Year (2024–2025) – Rialto School District
Honored for leading in key offensive categories and delivering in high-pressure situations.

Athlete of the Year (2022–2023) – San Bernardino School District
One of only three students recognized district-wide for outstanding athletic performance and leadership.

School Achievement (2019):
First student from his school to finish a 5K race, winning $500 for his school and showcasing his dedication to athletic and community excellence.

Softball Instructor | Pitching Specialist
Collegiate Athlete – CSUSB Softball

Brooklyn Blackmon is a fourth-year collegiate softball pitcher at California State University, San Bernardino (CSUSB), with over 13 years of playing experience. During her collegiate career, she has thrown over 200 innings, recorded 119 strikeouts, and maintains a career ERA of 3.73.

Brooklyn was named to the 2022 All-Tournament Team and played a key role in CSUSB's 2023 NCAA Regional appearance. Known for her competitive spirit and strong pitching presence, she brings both experience and passion to every part of the game.

Beyond her on-field accomplishments, Brooklyn is committed to giving back to the softball community. She is excited to mentor and inspire the next generation of players by sharing her knowledge, experiences, and love for the sport.

Collegiate Pitcher | Baseball Instructor
California State University, San Bernardino (CSUSB)

Dylan is a collegiate starting pitcher originally from Tacoma, Washington. He began his college baseball career at Bellevue College, where he played for two years before transferring to California State University, San Bernardino. In his first year at CSUSB, Dylan helped lead the team to the NCAA Division II College World Series.

With three years of experience as a college starter, Dylan brings competitive game experience, mound presence, and leadership to every outing. He is currently entering his final year of collegiate eligibility and is focused on making the most of his senior season both on and off the field.

Director of Operations | Softball Travel Ball Program Director

George Tellez’s passion for sports began in his youth, playing Pop Warner football and later competing in adult softball for over a decade. In 2017, his journey in youth sports took a meaningful turn when he began coaching his daughter’s softball team. That experience sparked a deeper commitment to athlete development and led to his role as President of the Montclair Golden Girls Softball League, where he focused on building confident, well-rounded athletes both on and off the field.

In December 2024, George joined Diamond Club Athletics as Director of Softball Travel Ball Program, where he now oversees a growing travel ball program serving athletes from 8U to 18U. Under his leadership, Diamond Club has also launched a Strength, Conditioning, and Agility Summer Program—a key step toward building a full-scale athlete development academy.

George is passionate about mentoring driven athletes and is dedicated to shaping the next generation of competitors through structure, discipline, and a love for the game.goes here

Collegiate Outfielder | Baseball Instructor
California State University, San Bernardino (CSUSB)

Jeremy Giesegh is a third-year collegiate outfielder at California State University, San Bernardino. With 16 years of baseball experience, Jeremy brings a wealth of knowledge and skill to the field, highlighted by his impressive .351 batting average in a previous college season.

He has competed at the NCAA College World Series and gained valuable exposure through MLB Network. Jeremy is passionate about sharing his expertise and is eager to mentor and develop aspiring athletes by passing down the knowledge he has gained throughout his baseball journey.

J.R. – NASM Certified Athletic Performance Specialist
Specializing in Catching, Hitting, Mobility & Athletic Performance

Originally from Upland, California, J.R. has always been passionate about sports, travel, and the outdoors. After years of struggling with his weight and turning to short-term solutions, he discovered that consistent exercise and proper nutrition were the keys to long-term wellness. This lifestyle transformation became his foundation—not just for personal growth, but for helping others do the same.

As a NASM Certified Athletic Performance Specialist, J.R. now uses his experience and knowledge to train athletes of all levels. His specialties include:

Catching development (mechanics, mobility, and game awareness)

Hitting instruction (technique, timing, and approach)

Athletic performance (speed, agility, and strength)

Mobility training (injury prevention, movement quality, and recovery)

J.R. is committed to building strong, confident athletes through structured, goal-driven training while also promoting a healthy, sustainable lifestyle both on and off the field.

Baseball Coach | Player Development Specialist

With over 30 years of experience in baseball, JR began their journey at the age of five and has played at every level—from youth leagues and high school ball to adult Sunday leagues. Transitioning into coaching when their son started playing at age four, JR has dedicated 25 seasons to mentoring and developing young athletes.

Passionate about guiding players through their baseball journey, JR focuses on cultivating not only skills but also confidence and character. Baseball is a lifelong commitment, and even after three decades, JR remains a dedicated student of the game—always learning, evolving, and driven by a deep love for the sport.

Hitting Coach | Baseball Instructor

Nick brings a diverse background in both playing and coaching baseball, with experience spanning multiple collegiate summer leagues and educational institutions. He has coached as the varsity hitting coach at Norte Vista High School for three years and served as the JV coach at La Sierra High School for one year.

Nick’s playing career includes time with San Bernardino Valley College, Bethany College, and a four-year stint in the Pecos Independent League, where he earned a championship title in 2020. Additionally, he played in several collegiate summer leagues, including the Sunset Collegiate Summer League, Palm Springs Collegiate Summer League, and Ohio Valley Collegiate Summer League. Nick also spent one year at College of the Desert and worked as a broadcaster for Community Christian College for two years.

His extensive experience as both a player and coach makes him a valuable asset in developing hitting skills and baseball IQ.

Current Assistant Pitcher Coach & Hitter | Baseball Instructor

 With 3 years of professional experience—including time in MLB-partnered leagues—and multiple All-Star honors like Reliever of the Year in both the NYCBL and USPBL, Keon knows what it takes to compete and succeed at a high level. Now serving as an Assistant Pitching Coach at CMU, he specializes in both pitching and hitting instruction, helping athletes develop well-rounded, game-ready skills. Keon is committed to working with players of all ages through focused, personalized training.

Pitching Coach | Strength & Conditioning Specialist

Ian Wadenius is the Pitching Coach at Hillcrest High School and a former collegiate player for Holy Names University and Whittier College. He specializes in pitching development, strength, and conditioning.

Born and raised in Riverside, California, Ian has a lifelong passion for baseball, weight training, and helping athletes reach their full potential. He holds a Bachelor of Arts in Kinesiology, with a focus on sport movements, physiology, anatomy, and psychology.

Combining his academic knowledge, collegiate playing experience, and coaching at the high school level, Ian helps athletes improve their performance through:

Mobility routines and dynamic warm-ups

Arm care and plyometric drills tailored to individual needs

Assessment-based strategies for pitching development

Ian is dedicated to developing athletes both physically and mentally through structured throwing and lifting programs, guiding them to achieve their short- and long-term goals.re

Softball- Current College D3 Softball Coach 
Hitting / Fielding

Hi future D1 athletes! I’m Coach Bella Rocco, a former Division I softball player from Fresno State, where I earned my bachelor’s in Health & Sport Sciences. During my career, I was honored as Mountain West Freshman of the Year, named to the All-Mountain West First Team, and recognized on the Academic All-Mountain West list.

I’ve been playing softball since the age of 4, competing for one of the nation’s top travel programs, the Corona Angels. Now, as a college coach, I take a very visual approach to training — breaking down your swing step-by-step with simple cues and clear video analysis. I believe we can fix anything, but it all starts with passion and the right mindset.

Favorite Quote: “She believed she could, so she did.”
Mental Toughness Motto: Brick by Brick

Hitting-Pitching & Fielding Trainer| Softball Instructor/Trainer

 Hi! My name is Yasmine Brezic, and I’m currently playing college softball at Chaffey College, after transferring from Riverside City College. I’ve been playing the game since I was 8, so softball has been a huge part of my life for over 13 years!

I love coaching and helping players grow their skills while keeping their passion for the game alive. I specialize in fielding, hitting, and pitching—and I’ve been pitching for about 10 years. I’ve also played multiple positions in college, including 1st base, 3rd base, middle infield, and outfield, so I can help with nearly any fielding position (except catcher).

I’m excited to share my experience and help players take their game to the next level!

Baseball Coach | Former Collegiate Athlete

I’m proud to bring years of experience and a deep passion for the game to the next generation of athletes. My collegiate baseball journey began at Cal State Fullerton, where I played for two years before transferring to Cypress College to continue competing and developing my game. I completed my career at Cal Poly Pomona, spending two more years sharpening my skills both on and off the field.

With a well-rounded background across multiple competitive programs, I’ve gained valuable insight into various styles of play and coaching philosophies—knowledge I’m eager to pass on to the athletes I work with. My goal is to help each player grow not just in their technique and performance, but also in their confidence, discipline, and mindset.

I’m excited to meet all of my athletes and begin working together to unlock their full potential. Let’s get better every single day!