Reggie McGill was a standout high school athlete, earning honors such as Parade All-American and having his jersey retired. He continued his success as a four-year starting running back at the University of Arizona, where he majored in Exercise Sports Science, driven by his love for P.E. and coaching.

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After pursuing an NFL career, Reggie transitioned to education, becoming a certified high school P.E. teacher and earning a Master’s in Secondary Education. In 1997, he founded Extreme Speed Training to help young athletes excel through athletic development.

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Over the past 15 years, Reggie has trained nearly 100 athletes who earned college scholarships. His passion is giving back, using his experience in sports and education to guide the next generation toward success.

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Karlas Mauzy, co-founder of Extreme Speed Training alongside Reggie McGill, has been training athletes in the Valley of the Sun for over 20 years.

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A former Mr. Arizona, Mr. Southwest America, and Mr. Mid-USA bodybuilding titleholder, Karlas is also an experienced sprint coach. He holds a bachelor's degree in Criminology and four Black Belts in various martial arts disciplines.

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Karlas has trained athletes from numerous high schools and colleges across Arizona and beyond. In addition to coaching, he works in the mental health field as a Program Coordinator for New Horizon Youth Homes, managing West Valley group homes.

Brad and Reggie first crossed paths in 2006 when Reggie began working with Brad’s son, Brendan, and his football team. Two years later, their shared passion for developing young athletes led them to form a brief business partnership, which included the early stages of Extreme Speed Training.

Though the partnership was short-lived, the two stayed connected as both of Brad’s children continued training with Reggie.

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Several years later, the opportunity arose to establish a more permanent partnership. When Extreme Speed Training moved to its current location, Brad and Reggie joined forces once again — this time with the space and vision needed to fully pursue their shared goals.

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Before his work with Extreme Speed Training, Brad was deeply involved in youth sports. He served as President of one of Arizona’s largest Little Leagues for three years and co-founded a nationally ranked youth baseball team, where he also coached. Additionally, Brad worked with a professional cycling team, providing both on- and off-the-road support.

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A lifelong athlete himself, Brad is an avid mountain biker and dedicated youth trainer. In the gym, he focuses on high-intensity resistance training designed to challenge and develop some of our most advanced athletes.

Michael Richmond, a two-time Arizona State football champion at St. Mary’s High School, earned a full-ride scholarship to New Mexico State University, where he played wide receiver and ran track. After graduating with a degree in Justice Studies, he played three seasons with the Arizona Rattlers in the Arena Football League.

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Michael began his coaching career at St. Mary’s High School in 2010, followed by coaching sprinters at Chaparral High School in 2011. In 2014, he led Sal Pointe Charter High School to an undefeated season and a state championship. With over 15 years of experience training athletes, Michael is a valuable asset to Extreme Speed Training.

RJ McGill, a multi-sport athlete at St. Mary’s High School in Phoenix, earned 1st Team All-State Running Back and 5A 2-Way Player of the Year honors. He received a D1 full-ride scholarship to the University of North Dakota, where he played slot receiver and graduated with a Communications degree and a 3.5 GPA.

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With over 10 years of experience training young athletes, RJ shares the mindset, work ethic, and leadership skills needed for success on and off the field. His passion goes beyond sports—helping athletes grow in every aspect of their lives.

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