The purpose of this thesis is to examine the factors leading to the valuations of professional sports teams, with a focus on three of the largest professional sports by revenue: soccer, baseball, and basketball. The main goal of this report is to analyze historical growth rates in the total price paid for professional sports teams and the value-added activities that lead to increased sales prices well above the Forbes yearly valuation. Additionally, we will incorporate statistical analysis and data sets highlighting different approaches and valuation tactics used when determining a proper sales price for a team that can be incorporated in future research and provide a basis for explaining the high price many are willing to pay to acquire a sports franchise.