Boston Red Sox confirm MassMutual as signature sponsor - SportsPro
Boston Red Sox mascots Wally and Tessie display the patch during a News Photo - Getty Images
L.A. Angels have new MLB jersey patch sponsorship
Iconic Massachusetts Brands Unite: MassMutual Named Signature Partner and First Ever Jersey Patch Sponsor of the Boston Red Sox
MLB's Red Sox land MassMutual as jersey patch sponsor - Sportcal
MLB Teams with Jersey Patch Sponsors for the 2023 Season - Zoomph
Yankees Announce Starr Insurance Jersey Patch, Partnership in Video, News, Scores, Highlights, Stats, and Rumors
Boston Red Sox make history with record $170 million ad-patch deal, other teams to follow suit
Phillies may have sponsored uniform patch this season
FIRST LOOK: sponsor patches on 2023 MLB jerseys