Action Comics #389

Action Comics #389 (On Sale: April 30, 1970) has a Superman cover by Curt Swan and Murphy Anderson.

We begin with "The Kid Who Struck Out Superman!" by Leo Dorfman, Curt Swan and George Roussos. Superman decides to try out for the Metropolis Majestics baseball team. During the try-out the coach asks if his nephew can pitch to Superman. The Man of Steel agrees, and the little league pitcher strikes him out. Superman takes the ball and throws it into space.

Later Superman tries out for a soccer team, a basketball team and a football team. He also tries out as a boxer and a tennis player.  He excels at each sport, but doesn't join the teams. Instead he throws, punches, and kicks more sports equipment into space.

We then learn that an invading alien race has sent a probe into Earth's atmosphere, a probe he cannot approach or it will explode. However, all the sports equipment has been lodged on the air intakes. When the probe returns to it's home planet, the air from the intakes is analyzed by the aliens and determined to be dangerous. Therefore the alien plan for conquest is called off, just as Superman had planned when he inflated the equipment with dangerous gasses.

Next is the Legion of Super-Heroes in "The Mystery Legionnaire!" by Cary Bates, Winslow Mortimer and Jack Abel.  The android Klim, created by four disabled criminals on pinion asteroid Voran-4, was undefeated until it encountered members of the Legion of Super-Heroes. However, the head of the android escaped. When Klim's body regains power, it seeks to rejoin the head. Cosmic Boy, Chemical King, and Shrinking Violet track the body to Voran-4.. After battling their way through booby-traps, the Legionnaires find the head. Klim wants revenge against the Legionnaire who defeated him, but in the first battle his vision was damaged. He thought Cosmic Boy and Chemical King were the same person. While Klim announces his revenge plan, Shrinking Violet disables him, ending the threat. This story was reprinted in Legion of Super-Heroes Archives Vol. 9 HC and Showcase Presents: Legion of Super-Heroes Vol. 4 TPB.

Edited by Mort Weisinger.