MassMutual will be the first sponsor to have its logo on Red Sox

Boston Red Sox

Cleveland Guardians Announce Jersey Sponsorship - Sports Illustrated Cleveland Guardians News, Analysis and More

MLB's Red Sox land MassMutual as jersey patch sponsor - Sportcal

Yankees Jersey Patch Deal Is MLB's Richest at $25M a Year –

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

MassMutual, Red Sox announce multiyear partnership

Tanner Houck had 'conversations' with Red Sox about extension, open to deal

Red Sox pitcher Chris Sale scheduled to make rehab stop in Syracuse

MassMutual will be the first sponsor to have its logo on Red Sox uniforms - The Boston Globe

Boston Red Sox sign BetMGM as first betting sponsor

MLB's new uniform rules won't prevent Red Sox from keeping Boston traditions – Boston Herald

Jennifer Halloran posted on LinkedIn