Kammala jumla mai zuwa: Betts ya gama kakar 2020 yana buga.292 /.366 /.562 tare da gudu 47 (na 4 a cikin NL), 16 home runs (3rd), 39 RBIs, a.928 OPS, da 10 sata tushe. A kan hanyarsa ta zuwa gasar cin kofin duniya ta biyu a tsawon shekaru uku, Betts ya yi jerin wasanni uku a jere yana ceton duwatsu masu daraja a cikin wasannin da aka fitar don Dodgers a cikin NLCS da Atlanta Braves. A gasar cin kofin duniya, Betts ya zira kwallaye biyu kuma ya buga gida. Betts kuma ya buga wasan homer a wasan 5 na
<unk>18 World Series, lokacin da Red Sox ya ci gaba da cin nasara. Ya zama dan wasa na tara da ya buga homer a cikin wasannin World Series da yawa, kuma na biyu ne kawai ya yi hakan tare da kungiyoyi daban-daban <unk> shiga Reggie Jackson. Abubuwan da ya yi sau takwas a cikin postseason sun yi daidai da babban rikodin gasar don yawancin sau biyu a cikin postseason daya. Bayan kakar wasa, an ba Betts lambar yabo ta biyar a jere (na farko a cikin National League) da na huɗu na Silver Slugger. Ya gama na biyu a zaben MVP na NL bayan Freddie Freeman na Atlanta Braves.