The aim of the current study is to analyze and interpret the legitimacy structures of governance in sports organizations. To achieve this goal, researchers designed a mixed exploratory-analytical research plan. This mixed sequential study (interpretative-positivism) consists of a qualitative part based on the research synthesis approach (systematic review) and a quantitative part based on the multi-indicator decision-making approach focused on structural-interpretive modeling analysis. In the qualitative phase, databases from 2015 to 2023 were reviewed to adjust and select studies. To enhance reporting transparency and evidence quality, the researchers utilized the reporting guide (emerge) and the partial quality tool of Wash and Devon (2006) for an objective evaluation of study quality. In the quantitative phase, experts were involved in designing the structural-interpretive model of the sports governance system. A systematic review employing inductive thematic analysis of relevant literature identified eight semantic patterns as key elements of good governance in sports. The results of the structural-interpretive modeling revealed that structures related to good governance exist at three levels: the foundational level (including democratic processes - diversity, independence in governance, integrity of governance, and participatory governance), the procedural level of the governance system (government accountability and transparency), and the third level or the system's output (cyber governance and social responsibility). Furthermore, a detailed interpretation of the Mik Mak diagram showed that most governance-related structures are interconnected variables within the system. Effective governance in a sports organization can be defined as the implementation of principles and values that increase the organization's legitimacy. This means that processes and decisions are carried out transparently and fairly, while also ensuring accountability and responsiveness to the community.