Incoming freshman won two Silver medals and a Bronze medal at the meet in her hometown in Russia.
Campbell, the U.S. 1500 Freestyle champion, was named to the 800 Free roster.
Annika Lenz set a personal record in the Platform last week to finish second in the National event.
Fans can watch Katy Campbell's National Championship-winning swim in the 1500 Freestyle.
Katy Campbell claimed first-place honors in the 1500 Freestyle on Sunday (photo: Getty Images).