As a Black woman in an overwhelmingly white sport, Simone Manuel knows her experiences and opinions on racism and inclusion carry weight. But she’s tired of talking. Addressing systemic racism is a societal problem and, if it’s going to be fixed, everyone needs to be part of the conversation.

When Tierna Davidson earned a spot on last summer’s World Cup squad, she knew what was expected. Dominance on the field, of course, as the defender was the youngest member of the team that won a fourth World Cup title. But strength off of it, too, as Davidson has joined her teammates in using her...