The factors influencing shifts in the demand for professional baseball are investigated. Initially, the logical framework behind attendance patterns is presented as a prelude to the theoretical model. Graphical analysis and classical optimization techniques are then used to transform the model logic discussion into a theoretical model. Lastly, the validity of the theoretical postulates is tested through use of regression analysis. All the empirical findings are tabulated and analyzed in light of the theoretical model in order to determine the relative impact of each variable on attendance. Current winning percentage, population density, lagged winning percentage, and the percentage of workers employed in manufacturing prove to be of utmost importance.