I'm glad the Phillies didn't put sponsors on their jerseys. It looks so cheap. : r/phillies
Larger-Than-Life Drone Show Celebrates MassMutual's Sponsorship of the Boston Red Sox
MassMutual will be the first sponsor to have its logo on Red Sox uniforms - The Boston Globe
Red Sox uniforms will be unaffected by new MLB rules in 2023
Yankees won't have jersey patch for Opening Day, but it's coming
Red Sox accidentally picked Yankees fan to sponsor jerseys for next decade
Why are the Angels wearing jersey patches with 'FBM' on them? - Los Angeles Times
Boston Red Sox mascots Wally and Tessie display the patch during a News Photo - Getty Images
Red Sox, MassMutual near a $17M jersey patch deal - Boston Business Journal
Why MassMutual invested in a jersey sponsorship with the Red Sox
Red Sox reportedly sign jersey patch deal with MassMutual
MassMutual will be advertising on the Red Sox jersey in 2023. - Over the Monster
MassMutual, Red Sox announce multiyear partnership
MassMutual lands deal for patch on Red Sox uniforms; Springfield company's deal with $17M yearly (report)