Spencer grew up around esteemed athletes and sports executives, giving him a unique understanding of how elite athletes succeed. An NYU graduate, Spencer has held roles across major sports and media organizations. He founded 3G Sports in 2019 to elevate women’s athlete representation, quickly making an impact alongside his first client, Saroya Tinker. Spencer is a leading voice in women’s hockey, guiding top talent and overseeing the daily operations of 3G Sports.
About
Modern support backed by60 years of pro sports expertise.
The record
No other agency has the leadership team and tireless work ethic that 3G Sports has.
The name Third Generation Sports is representative of the legacy and innovation that the agency carries. Led by Spencer Gillis, the agency is backed by 60+ years of pro sports experience in Mathieu Schneider and Sean White, among others. Using our collective experience we are here to write a new chapter in athlete representation and provide maximum value for our clients.
The team
Mathieu played 1,289 NHL games from 1987–2010, winning a Stanley Cup in 1993, earning All-Star honours, and helping the U.S. capture the inaugural 1996 World Cup of Hockey. A two-time Olympian and U.S. Hockey Hall of Famer, he ranks among the top American defensemen in major career categories. Before joining 3G, he spent over a decade as the NHLPA’s second-in-command, leading major initiatives in negotiations, partnerships, and player support.
Sean is one of Canada Rugby’s most respected figures, bringing 15+ years of international experience as a player and coach. He earned 27 test caps, played 32 HSBC Sevens Series tournaments, and competed at the 2011 Rugby World Cup before leading Canada’s Senior Men’s Sevens team. Now in athlete representation, he applies a high-performance mindset, clear communication, and trust-driven guidance to support rugby talent on and off the field.
Sarah is the Director of Partnerships and Community at 3G Sports, guiding athlete endorsements and community initiatives. A former D1 athlete with over 150 games at Syracuse and St. Lawrence. She earned the NCAA Hockey Humanitarian Award while completing degrees in Sport Management and Leadership. She also founded two hockey-focused programs supporting youth development and underserved communities. Sarah brings athlete experience and purpose-driven insight that elevates clients on and off the ice.
Jeremy is the Director of Business Operations and Legal at 3G Sports and has been a key part of the agency since its inception. A licensed lawyer in British Columbia and Arizona, he brings legal expertise shaped by four years in litigation and experience representing clients across the NHL, CFL, and PGA. With roles in scouting and hockey operations in Arizona, Jeremy’s blend of legal and sports knowledge is a major asset to 3G and its athletes.
Services
Effective representation meansmastering what matters most.
For the past five years, 3G Sports has refined a new representation model centred around expertise in three core pillars.
For everything beyond our core expertise, we tap into our trusted network to identify, evaluate, and present best-in-class resources.
Contract Negotiation
Our negotiation is backed by experience, legal expertise, and advanced market analysis. We secure maximum value for the short and long term, and have routinely set salary standards in professional hockey.
365-Day Approach
We are available for whatever our clients need, whenever they need it. Our experience means that we’ve seen and done it all before, and can plan better than anyone else for the future.
Player Development
Elevated performance through education, analysis, and mindset. We go through every detail to help athletes reach their full potential.
Health & Wellness
Access to top trainers, therapists, and medical experts with cutting-edge recovery, injury prevention, biomechanics, and full-body evaluations. We design plans to extend careers.
Becoming a Pro
We guide athletes through draft preparation, interview coaching, media training, and full support for families, so nothing is left to chance.
Content + Social Media
Our digital team assists clients in appearing in and creating bold, compelling content. We grow audiences, deepen engagement, and help athletes own their story.
Endorsements
We craft authentic athlete brands rooted in passion and purpose to earn partnerships that grow value and establish legacy on and off the ice.
Community Impact
Our athletes lead with purpose. We help them support causes that matter and create meaningful change in their communities.
Interested in working with the team behind hockey and rugby’s best?