In recent years, various intervention programs have been developed to enhance the quality of life of young athletes. This is particularly important for those who live in residences of professional clubs, far from their families. In this regard, we designed a positive psychology intervention program called “DÉPORVIDA”, aimed at enhancing character strengths. To assess the efficacy of this 8-week intervention, we tested 28 young soccer players from a Spanish professional club. The intervention program used a strength-based approach from the values in action (VIA) model, and was conducted by club employees with formal academic education. Data were analysed using a set of 2 × 2 (intervention × time) mixed design ANOVAs. Results revealed different trends for the intervention and the control groups participants for seasonal performance satisfaction and percentage of time feeling happy/unhappy, highlighting consistent changes in the desired direction. Overall, the results indicate that the DÉPORVIDA program is a useful tool to promote positive development in young athletes.