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

MLB's announced jersey patch deals so far-San Diego Padres: Motorola. Boston Red Sox: MassMutual. Los Angeles Angels: Foundation Building Materials. Arizona Diamondbacks: Avnet : r/baseball

Red Sox drop Game 2 to Rays after opening day/night doubleheader with come-from-behind win - The Boston Globe

Red Sox debut new uniform advertisements as part of 10-year deal with MassMutual, Sports

Devers breaks tie in 6-run 8th, Red Sox beat Reds 8-2 to avoid sweep

Red Sox' Triston Casas is blossoming into a fearsome power hitter – NBC Sports Boston

Red Sox vs. Yankees: Odds, spread, over/under - September 12

Red Sox Mass Mutual Collaboration – NBC Boston

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

The Red Sox, for all the streakiness, are proving exactly who we thought they were