Story 1: The Unknown Legionnaire
The Legion of Super-Heroes reminisce over a case where they met Unknown Boy, a superhero who helped them out during a case. It had been revealed that Unknown Boy was actually Supergirl after suffering a bout with the red kryptonite, which caused her to have amnesia.
Story 2: One-Man Baseball Team
Superboy plays baseball.
Reprinted from Superboy (DC, 1949 series) #57