In line with previous practice history research, the results provide support for engaging in large amounts of football-specific practice from early ages. However, more research is necessary to address to what extent different variables may affect the developmental process. We argue that multi-level modeling, as used in the present study, represents an important first step for practice history research toward addressing the dynamical developmental process of football players over time. Such procedures would also allow for more closely accounting for the effects of different variables within this process.