The aim of this study was to develop a valid and reliable basketball common content knowledge (CCK) instrument for preservice teachers (PSTs; BB-CCK-T) in secondary physical education contexts in the United States. The research team used four steps to develop the BB-CCK-T. In the first step, two content experts determined the scope and weight of the items using a table of specifications. Second, the experts developed the test questions and answers based on the table of specifications. Third, physical education in-service teachers reviewed the test and checked the content validity. Fourth, a group of PSTs took the test for pilot testing. After content validity and face validity were established, the BB-CCK-T was administered to 76 physical education PSTs to examine the validity and reliability of the instrument using the Rasch analysis. The results of unidimensionality indicated that all items were within the range of -0.4 to 0.4. Both infit (0.7 to 1.3) and outfit (0.6 to 1.5) MNSQ were in the criterion range of 0.5 to 1.5. The result of the item separation index was 4.01 (Cronbach's alpha = 0.94), and the person separation index was 1.89 (Cronbach's alpha = 0.78). The wright map confirmed that the items on the BB-CCK-T contain wide levels of question difficulties with little gaps. These results verified that BB-CCK-T is an instrument with robust psychometric properties. Continuous efforts of exploring how we can best teach CCK in our limited curricular space as teacher education programs are vital from both practical and research perspectives.