They wore it on April 18th of this year.
Boston Red Sox unveil yellow and blue uniforms to honor Patriots' Day
SF Giants Honour Boston With B Strong Patch – SportsLogos.Net News
Boston Strong Patch
Red Sox select Cutter Coffey at No. 41 overall in second round of MLB Draft
After emotional ceremony, Red Sox beat Royals at Fenway
Guardians add Marathon as jersey patch sponsor
Red Sox honor Boston Marathon with new Nike uniforms collab National News - Bally Sports
Boston Red Sox wear special jerseys for Patriots Day
Boston Red Sox 'push the envelope' with marathon-inspired blue-yellow uniforms - ESPN
Red Sox Unveil New Boston Marathon-Themed Uniforms For Patriots' Day Weekend - CBS Boston