Fathers influence mothers' breastfeeding decisions and experiences. Fathers' perceptions of their roles as members of the breastfeeding family are likely important components of that influence. To explore that possibility, 21 involved fathers of breastfeeding babies volunteered to be interviewed regarding their fathering breastfed babies and their roles in the breastfeeding family. Fathers identified their unique roles as team members ensuring that their babies received the benefits of breastfeeding. A primary fathering role was that of supporting breastfeeding by becoming breastfeeding savvy, by using their knowledge to encourage and assist mothers in breastfeeding, by valuing the breastfeeding mothers, and by sharing housework and child care. Fathers' nurturing roles involved fostering positive father-infant relationships in the face of limited opportunities to bond with their babies through feeding. The experiences of these fathers suggest the importance of assisting them to recognize their unique contributions to the nurture of their children as members of the breastfeeding team.