Despite working memory capacity’s (WMC) role in decision-making, there is a dearth of empirical literature concerned with working memory and how it relates to tactical decision-making in sport. The temporal occlusion paradigm has often been used by sport researchers to improve tactical decision-making and, thus, provides a well-established foundation for creating decision-making trainings. Therefore, the purpose of the current study was to explore the implementation of computer-based learning modules to improve the tactical decision-making of four high school quarterbacks with varying levels of WMC, utilizing a single-subject, multiple baseline design. The learning modules utilized a temporal occlusion paradigm and present a novel intervention aimed at improving decision-making in quarterbacks. Data were analyzed using visual analysis and improvement rate difference (IRD). Overall, results did not demonstrate a causal relationship between changes in accuracy of decision-making after implementation of the learning modules, but did provide moderate evidence for improvement in reaction time for decision-making due to the learning modules. The learning modules were met with positive perceptions from the four participants, and the participant with the lowest WMC showed evidence of improvement in both accuracy and speed of decision-making. Limitations as well as implications will be discussed.