The summer lacrosse season is long and demanding. Dev Days are designed to give athletes a mid-summer tune-up — a chance to appreciate how much they've already put in and lock in on what's left to accomplish.

This isn't training for the sake of training. Dev Days are built around intentional work — the individual attention and focused reps that get lost in the chaos of the summer season. Light live reps, positional work, and skill refinement in an environment designed to sharpen what you've built all summer.

On top of the on-field work, One Play Development's Michael Mabry will be on site covering the mental performance and recruiting side of the game — helping players build their roadmap for the next few years and understand what it actually takes to get to the next level.

This isn't a camp. This is the Lab. Tune up your game — on the field and off — before the end-of-summer push.

Day 1 6PM-9PM — Tuesday July 7th HIGH SCHOOL

• Check In

• On Field Work with Lax Lab Staff

• One Play Development integration throughout the development day

Day 2 6PM-8PM— Wednesday July 8th Youth

• Check In

• Warm Up

• Positional Time

• Competition Drills

• Game Situations

Jules Heningburg

-Founder of Lax Lab

- 4x Premier Lacrosse League All-Star

- 2x Rutgers University Captain & All American.

-Drafted into the PLL and played Pro for 8 Years

Dylan Heningburg

-Director of Lax Lab

-Offensive Coordinator , Lawrenceville HS National Champion 2023

And the rest of the Lax Lab Staff!

Michael Mabry

Partner and Co-founder

Michael Mabry is a Partner and Co-Founder of One Play Development, where he leads the organization’s mission to positively reshape youth sports. A passionate advocate for holistic athlete development, Michael is committed to empowering athletes to thrive mentally, physically, and emotionally both on and off the field.

• 2x Team Captain at Christopher Newport University

• All-State & All-Conference Defenseman

• Champion All-American Game Selection (HS)

• Co-Founder of One Play Development 

• Certified EXOS Performance Specialist, Precision Nutrition Coach, and Mental Performance Mastery Coach

• Author of BPO ( Best Possible Outcome) and currently pursuing a Master’s in Sport Psychology at Escuela Universitaria Real Madrid – Universidad Europea

As a coach, Michael has held leadership positions in several top high school programs, specializing in player development, team culture, and mental performance. His certifications and experience as a trainer allow him to guide athletes through the mental and physical demands of high-level competition. Since co-founding One Play Development, Michael has directly impacted over 4,000 student-athletes, teaching them how to embody confidence, handle challenges, and positively influence others. His leadership continues to shape athletes, club teams, and high school programs across the country—helping them build confidence, overcome adversity, reach their highest potential, and develop winning records supported by winning cultures.

Recognized as one of Loudoun County’s 40 Under 40, Michael remains committed to advancing the future of youth sports through holistic development and mindset training.

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"Teach the student to teach themselves”