MassMutual is first jersey patch sponsor of the Red Sox

The Future Of Jersey Sponsorships Across US Sports Leagues

MassMutual will be advertising on the Red Sox jersey in 2023. - Over the Monster

Boston Red Sox confirm MassMutual as signature sponsor - SportsPro

Chris Cotillo on X: MassMutual is the new “signature partner” of the Red Sox. They get a jersey patch and the sign that replaces the John Hancock sign in center field. /

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

MLB's Detroit Tigers expand Meijer sponsorship with jersey patch deal

Boston Red Sox confirm MassMutual as signature sponsor - SportsPro

MassMutual lands deal for patch on Red Sox uniforms; Springfield company's deal with $17M yearly (report)

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

Boston Red Sox and Springfield-based life insurer, MassMutual partner up

MassMutual, Red Sox announce multiyear partnership

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