Red Sox reveal first-ever uniform advertisements; MassMutual patches coming in 2023
MLB's Rangers hire CSM to find first jersey patch sponsor - Sportcal
MassMutual will be the first sponsor to have its logo on Red Sox uniforms - The Boston Globe
Phillies may have sponsored uniform patch this season
MassMutual, Red Sox announce multiyear partnership
MLB Opening Day: Jersey Patches - Foul Or Fair Game?
jerseys – Blogging the Red Sox
MassMutual will be the first sponsor to have its logo on Red Sox uniforms - The Boston Globe
The Boston Red Sox announced a major off-the-field partnership with MassMutual
Red Sox Reportedly Strike $170M Jersey Patch Deal