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Bill O'Brien is a retired professional lacrosse player whose content blends box lacrosse, behind-the-scenes sports energy, and a fitness-first mindset. He’s a strong fit for brands targeting active, sports-driven audiences with authentic, high-engagement creator content.
Bill O'Brien is 6'4 235 lb Professional Lacrosse player. Bill is known as 'The Enforcer' playing a tough style of Defense in the National Lacrosse League. Bill is a fan favorite in the NLL due to his bigger than life size and personality. Bill O'Brien is also the CEO and CoFounder of Thompson Brothers Lacrosse, a Lacrosse brand partnered with Nike.
American Football, Crossfit
Sacred Heart University
United States
Native Vision, Headstrong Foundation, American Indian College Fund, The Aspire Project
Has access to a professional photographer
New to athlete partnerships? See how sports sponsorship works on OpenSponsorship.
1 post & 1 story with the Bill O'Brien promoting your product.
Long-term deal involving appearances, photoshoots, social media and more.
Have Bill O'Brien make a live appearance at your next event
Brands can sponsor Bill O'Brien on OpenSponsorship by creating a free account, browsing Bill O'Brien's profile, and sending a sponsorship proposal for social posts, appearances, or integrated campaigns. OpenSponsorship handles messaging, deliverables, and deal terms in one platform so you can connect directly with this athlete.
Bill O'Brien is listed on OpenSponsorship and available for brand sponsorships. Brands can review campaign packages, audience details, and pricing on this profile, then submit a proposal to start a partnership with this athlete.
According to OpenSponsorship, estimated pricing to sponsor Bill O'Brien starts at $4,000 for a social media post, $6,000 for a appearance and $36,000 for a brand ambassador campaign. Final rates depend on deliverables, usage rights, and campaign scope. Sign up on OpenSponsorship to view packages and send a proposal.
According to OpenSponsorship, Bill O'Brien's audience includes 57K+ Instagram followers, interests including Fitness & Performance, Activewear, Reading, Golf, Movies, and more, based in Syracuse, NY, United States. Brands can use this profile to evaluate reach, content niche, and sponsorship fit before sending a proposal.

How do you measure influencer marketing ROI when half the numbers social media gives you are vanity metrics? It is the question brands ask us most, and it came up again when I joined Massimo Marinelli on the Berkida Ventures Podcast. After more than ten years and thousands of brand deals with athletes and creators at OpenSponsorship, here is how we think about it, and the framework we use with our clients.
October 28, 2026