Kammala wannan jumla: Rosenthal ya samu nasarar shiga kakar wasa ta farko, wanda ya sa ya zama muhimmiyar mahimmanci a cikin 'yan Cardinals' yayin da suke buƙatar taimakon taimako. A wasan farko da ya buga da Washington Nationals a gasar zakarun kasa (NLDS), ya buga bangaren, ya yi ritaya da Jayson Werth, Bryce Harper, da Adam LaRoche yayin da ya ba da izini ga Ryan Zimmerman. Sauran wasanni shida ba tare da wata alama ba yayin da Cardinals suka ci gaba zuwa
Wasannin Gasar Zakarun Kasa (NLCS). A cikin duka, Rosenthal ya buga 15 daga cikin duka 30 batters fuskanci a 2012 playoffs.