Harper went down in three pitches to his former teammate. Meanwhile, Matt den Dekker and Reed Johnson debuted.
The Nationals added two new outfielder with only a few days left in spring training.
Rendon is getting a third opinion on his left knee and will need time to rest, so the Nationals are adjusting.
Gio Gonzalez, Nats, Nationals, Yunel Escobar, Danny Espinosa, Anthony Rendon, MLB,
The craziest day of the Nationals spring: what happened, what it means, and what might be next.
The Nationals sent fan favorite Blevins to the Mets in exchange for the 27-year-old left-handed hitting outfielder.
The third baseman is visiting James Andrews to get another look at his left knee.
Storen faced four batters, got two outs and left the game with a trainer after issuing a walk.
Janssen said he isn't sure how long he needs to rest or when he can return to game action.
Taylor Jordan makes the start so the Nationals rotation can be aligned for the regular season.