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Alfonsin Rosario profile image

Sponsor Alfonsin Rosario

Dominican Republic
Athlete
Baseball - Cleveland Guardians
Local
Reach
High
Response Rate

For brands

Want our team to run a deal with Alfonsin Rosario, or find athletes like them?

Our Account Managers handle outreach, negotiation and delivery for brands on the platform.

About Alfonsin Rosario — MLB baseball athlete

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.


Why you should sponsor me for your next influencer campaign?

 The #15 Prospect for the Cleveland Guardians.

Overview

👨Male
📍ClevelandOhioUnited States

Cleveland Guardians

Other...

Dominican Republic

Has access to a professional photographer

Pre-Packaged Projects

Frequently asked questions

Promote your brand and sponsor Alfonsin Rosario today!

New to athlete partnerships? See how sports sponsorship works on OpenSponsorship.

Health & WellnessFitness & PerformanceActivewearFashionPhotographyReligion

Pre-Packaged Projects

Social Media Deal

1 post & 1 story with the Alfonsin Rosario promoting your product.

$4,000
Estimated Price
Sign up to start an offer

Brand Ambassador Deal

Long-term deal involving appearances, photoshoots, social media and more.

$36,000
Estimated Price
Sign up to start an offer

Appearance Deal

Have Alfonsin Rosario make a live appearance at your next event

$6,000
Estimated Price
Sign up to start an offer

Custom

Need help on a custom package for this athlete?

Login to request help

Frequently asked questions

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.

Influencer Marketing Benchmarks: How Many Viewers Click an Influencer's Link? (2026)

Influencer Marketing Benchmarks: How Many Viewers Click an Influencer's Link? (2026)

Every brand running an influencer campaign on a cost-per-acquisition target eventually asks the same question: how many people will click the link? It decides how many creators you need, and whether your CAC target is realistic before you spend a dollar.

October 29, 2026

How to Measure Influencer Marketing ROI: A 5-Step Framework

How to Measure Influencer Marketing ROI: A 5-Step Framework

 

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

Nano vs Micro vs Mega Influencers: What 1,527 Creator Campaigns Reveal About Cost and ROI

Nano vs Micro vs Mega Influencers: What 1,527 Creator Campaigns Reveal About Cost and ROI

Every influencer marketing article tells you the same thing: micro-influencers are better value. Almost none of them show you the receipts. So we pulled ours.

July 15, 2026

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Get to Know Guardians No. 13 Prospect Alfonsin Rosario After Triple-A Promotion - Sports Illustrated

July 20, 2026

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RubberDucks Alfonsin Rosario named Eastern League All-Star - MLB.com

September 21, 2026

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Guardians’ Alfonsin Rosario homers in Venezuela - NBC Sports

November 4, 2026

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Minor League Recap - Akron Pitchers Strike Out Fourteen, Alfonsin Rosario Hits First AAA Home Run - Covering the Corner

August 1, 2026

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Cleveland Guardians Prospect Report 11/2-11/8/26 - Next Year in Cleveland

November 9, 2026

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5 Key Promotions To Know - Beehiiv

July 14, 2026

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