Rubuta ci gaba ga wannan sakin layi - A ranar 3 ga watan Agusta, bayan sanya mai karɓar Blake Swihart a cikin jerin nakasassu, Red Sox sun ƙara Butler zuwa jerin manyan wasannin su. Ya fara wasan sa na farko tare da Boston a ranar 10 ga Agusta, ya bayyana a wasanni biyu yayin da yake tafiya 1-for-6 (.167) a farantin, sannan aka sanya shi don aiki a ranar 14 ga Agusta lokacin da Swihart ya dawo daga jerin nakasassu. A ranar 15 ga watan Agusta, an tura Butler kai tsaye zuwa Triple-A Pawtucket. Ya zabi 'yanci kyauta a ranar 2 ga Nuwamba, 2018. Butler ta takaice a kan Red Sox ta aiki roster a lokacin da 2018 World Series
gudu ya sa ya cancanci samun kambin zakarun.