
Alfonsin Rosario is a professional baseball player with the Cleveland Guardians organization, bringing authentic pro-level credibility, strong athletic visuals, and consistent engagement around training, faith, and game-day lifestyle content. He’s a great fit for brands looking for a rising MLB talent with a polished presence and natural alignment to performance, activewear, and inspirational campaigns.
The #15 Prospect for the Cleveland Guardians.
Cleveland Guardians
Other...
Dominican Republic
Has access to a professional photographer
New to athlete partnerships? See how sports sponsorship works on OpenSponsorship.
1 post & 1 story with the Alfonsin Rosario promoting your product.
Long-term deal involving appearances, photoshoots, social media and more.
Have Alfonsin Rosario make a live appearance at your next event
Brands can sponsor Alfonsin Rosario on OpenSponsorship by creating a free account, browsing Alfonsin Rosario'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.
Alfonsin Rosario 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 Alfonsin Rosario 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, Alfonsin Rosario's audience includes 15K+ Instagram followers, interests including Health & Wellness, Fitness & Performance, Activewear, Fashion, Photography, and more, based in Cleveland, Ohio, United States. Brands can use this profile to evaluate reach, content niche, and sponsorship fit before sending a proposal.

Genisys Credit Union, headquartered in Auburn Hills, Michigan, has done something most brands never do with athlete sponsorship: it kept renewing. What started as a single partnership with Detroit Lions tight end Sam LaPorta has become a multi-year, two-athlete program that Genisys has renewed and expanded every season since 2024, adding Lions wide receiver Isaac TeSlaa in 2025 and renewing him again in 2026.
October 6, 2026