Stengel had appeared in five matches for Washington this season. She scored four goals in 19 appearances for the Spirit last season. Castleberry was drafted in the fourth road of the 2017 NWSL College Draft. She appeared in two games this season.
The Spirit recently announced that forward Estefanía Banini would be rejoining the team this season. On Tuesday, the team announced the signing of forward Yanara Aedo.