In sports such as soccer, cricket and baseball, players need to intercept balls travelling long distances in the air from the point of contact with a foot or a bat. As outlined in the chapter by Montagne and Laurent, these interceptive actions can be difficult because players often need to run a long way to make the interceptions. In cricket and baseball, such trajectories are known as fly balls. The goal of our chapter is to provide an overview of theory and research on how people catch fly balls. More particularly, we address the issue of locomotion in interception: how do people control their movement so that they are at the right place at the right time to intercept a ball?.