MassMutual is first jersey patch sponsor of the Red Sox

Larger-Than-Life Drone Show Celebrates MassMutual's Sponsorship of the Boston Red Sox

Boston Red Sox confirm MassMutual as signature sponsor - SportsPro

Boston Red Sox Announce MassMutual Patch on Jerseys Starting in 2023 – SportsLogos.Net News

Logos and uniforms of the Boston Red Sox - Wikipedia

Red Sox to sport MassMutual logo under new partnership - Boston Business Journal

Boston Red Sox confirm MassMutual as signature sponsor - SportsPro

Iconic Massachusetts Brands Unite: MassMutual Named Signature Partner and First Ever Jersey Patch Sponsor of the Boston Red Sox

Why more US leagues are embracing sponsored jersey patches, encroaching on 'sacred' real estate

Iconic Massachusetts Brands Unite: MassMutual Named Signature Partner and First Ever Jersey Patch Sponsor of the Boston Red Sox

MLB Jersey Patch Market Warming Up As Season Approaches

MLB's Rangers hire CSM to find first jersey patch sponsor - Sportcal

Red Sox fans dismayed by their team's new sponsored jerseys

Crazy Quilt: Jersey Sponsorships Result in Patchwork of Deals - TicketManager

John Hancock ending long-held Boston Red Sox sponsorship