MassMutual will be the first sponsor to have its logo on Red Sox
MassMutual lands deal for patch on Red Sox uniforms; Springfield
Red Sox Reportedly Strike $170M Jersey Patch Deal
Sox say so long to John Hancock. But hello maybe to MassMutual
What MLB teams will have uniform ad patches in 2023?
Phillies may have sponsored uniform patch this season
MLB's Red Sox land MassMutual as jersey patch sponsor - Sportcal
Red Sox reportedly sign jersey patch deal with MassMutual
MLB Teams with Jersey Patch Sponsors for the 2023 Season - Zoomph
Red Sox debut new uniform advertisements as part of 10-year deal