Rubuta ci gaba don wannan sakin layi - An canza Swihart zuwa mai amfani da kayan aiki don 2018; ya buga na farko, na uku, mai karɓa, da kuma filin hagu a lokacin horo na bazara. A tsakiyar watan Mayu, wakilin sa ya nemi Red Sox su yi musayar Swihart, saboda iyakantaccen lokacin wasa da kungiyar. A lokacin, Swihart yana buga.138 (4-for-29) a cikin bayyanar farantin 32, bayan ya buga wasanni a mai karɓar, tushe na farko, filin hagu, da kuma mai ba da izini. An sanya Swihart a cikin jerin nakasassu a ranar 3 ga Agusta, tare da raunin hamstring na dama. A wannan lokacin a kakar wasa, ya bayyana a wasanni 51, yana buga.226 tare da gida daya da RBIs shida. Ya koma cikin jerin masu aiki a ranar 14 ga watan Agusta. Swihart ya taka leda a cikin kakar wasa a matsayin dan wasan benci, yana fitowa a wasanni 82 da kuma buga.229/.285/.328 tare da gida uku. A cikin postseason, Swihart ya buga wasa biyu a cikin filin waje kuma ya kama wani wasa, yana zuwa 0-for-3 a farantin, kamar yadda Red Sox ya lashe gasar cin kofin duniya
a wasanni biyar a kan Los Angeles Dodgers.