Compared with working-class parents, middle-class parents increasingly promote sports performance for their children as part of a larger strategy of ensuring that their children are upwardly mobile and likely to attend and graduate from college. However, we need to learn more about the distribution of youth sports performance in specific sports and whether it relates to social class. In this study, we test for a relationship between social class and performance in girls soccer by examining the success of high school girls soccer teams in 16,091 contests. We find that schools with more working-class youth consistently lose by many goals. The relationship between performance and social class is weaker in predominantly Latinx schools than in predominantly Black and predominantly White ones, likely reflecting the community cultural wealth in soccer in Latinx immigrant communities. We discuss the practical and theoretical implications of these findings.