Kammala jumla mai zuwa: López ne watakila mafi kyau da aka sani ga rawar da ya taka a matsayin saitin reliever ga Tigers a lokacin da suka 1984 gasar zakarun Turai kakar, a lõkacin da ya gama da 10<unk>1 rikodin, 14 ceton, da kuma 2.94 ERA. López yana da rikodin 1 <unk> 0 a duka biyun
1984 American League Championship Series (ALCS) da kuma 1984 World Series, kuma bai ba da gudummawar da ya samu ba a cikin sama da innings shida da aka jefa a wannan kakar. Ya fuskanci 'yan wasa bakwai a Game Five na 1984 World Series, ya yi ritaya da su duka a Detroit ta 8-4 Championship-clinching nasara. Bayan da mai jefa kwallo ya fita daga wasu karin wasanni biyu don samun nasara a wasa na 2 na ALCS a Kansas City, kocin Detroit Sparky Anderson ya ce, "Babu abin da ya ba ni mamaki game da Lopez. Na yi shekaru biyar ina da shi kuma ku yi imani da ni, babu wani kamarsa. Yana da zuciya kuma babu wanda ya fi shi. Shi ne daya daga cikin dukan lokaci zukãtansu. " Yayin da yake Detroit, López ya sami laƙabi da "Señor Smoke", kamar yadda ya fito daga Mexico kuma ya jefa ƙwallon mai ƙarfi.