Sibling relationships are some of the most influential throughout one's life. While family influences have often been examined in sports settings, less has been studied regarding the specific roles siblings may play. Research suggests that the way athletes view sport participation can be shaped by their experiences and relationships with siblings. Athletes may choose or avoid certain physical activities based on the interests of their siblings, and athletes may define their athletic abilities based on the abilities of their siblings. Moreover, natural rivalry exists between siblings and is especially present when siblings compete against one another in sport contexts. Coaches should be aware of the ways siblings influence one another and utilize strategies that encourage athletes to experience individual success. The purpose of this article is to increase awareness about sibling influences in sport settings and provide practical recommendations for coaches working with athletes who have siblings. The suggested tactics include avoiding direct comparisons, acknowledging biases, utilizing task sheets, and modifying activities to foster individual success. Coaches who encourage individual differences can maximize the positive experiences of siblings in sport and promote continued participation in physical activities.