The St. Louis Cardinals swept a doubleheader against the Chicago Cubs, with Nolan Arenado delivering a crucial two-run single in the eighth inning of the second game, leading to a 5-4 victory. Arenado's performance, despite not scoring or securing extra-base hits, showcased his consistency in driving in runs. This win marked a significant moment for Arenado after a challenging season due to injuries. The Cardinals' success was also fueled by Masyn Winn and Willson Contreras' home runs and effective pitching, closing both games with Ryan Helsley's MLB-leading 32nd save. The emotional and pivotal win boosted the Cardinals and contributed to their strong performance in the doubleheader sweep against the Cubs.