This study examines factors that contribute to multiple brothers playing in the NFL. It will focus on three families that have had three or more sons play in the NFL: the Gronkowski family with four brothers, the Fuller family with four brothers, and the Watt family with three brothers. The study will use qualitative interviews of players, families, coaches and others to understand how upbringing, training, inspiration and other resources impacted the brothers' success. It aims to provide insight on how parents can optimize their children's success in higher-level sports.