This article explores the interdisciplinary research opportunities for physics PhD students in the field of sports physics. It provides an overview of the basic principles of physics involved in sports, examples of sports that utilize physics principles, and how understanding the physics of sports can lead to advancements in sports technology. It also discusses current research projects in sports physics, the role of Alain Karma and the Center for Interdisciplinary Research on Complex Systems, and how physics PhD students can contribute to the field of sports physics.