"When Marvin moves to a new neighborhood, he wants nothing more than to join the local baseball team. After all, he loves playing baseball more than anything, and with his lucky baseball bat in hand, what could go wrong? But when that same lucky bat goes missing, Marvin completely loses his ability to play ball. Without it, he can't see how he'll ever live up to his baseball heroes. But even though he's lost his talent, Marvin might just find something...

When fourteen-year-old baseball player Hutch feels threatened by the arrival of a new teammate named Darryl, he tries to work through his insecurities about both Darryl and his remote and silent father, who was once a great ballplayer too.

Jody is a catcher who is afraid to throw the ball hard, and after getting beaned by the ball one day when he is at bat, he is also afraid of a pitched ball, and must struggle to overcome his fears and humiliation.

The Aldens help out at a minor league stadium and investigate when it appears someone in the ballpark is stealing the home team pitcher's signals and relaying them to the batters of the other team.

Bobby wants to help his older brother, Kirby, be the first baseman for the AllStar team, but another player seems to be a better choice. Then Bobby sees his chance to give Kirby the advantage, but will his conscience let him?

While visiting Houston, Texas, Mike and Kate tour the Johnson Space Center with an astronaut in the morning and at the Houston Astros' ball game that evening, the cousins search for the person who steals the astronaut's moonrock when he arrives at the stadium to sign autographs.

Mike Hagin offers his new friend from Russia the first baseman's position on the little league team before he finds out the boy can't play baseball.

Sylvester Coddmyer III, a poor but enthusiastic baseball player, becomes a phenomenal hitter after he meets a mysterious stranger resembling Babe Ruth who offers to help him improve his batting skills.

Stosh travels back to 1969 to try to prevent the untimely death of Roberto Clemente, a legendary baseball player and humanitarian, but upon his return to the present, he meets his own great-grandson who takes him into the future, and what he finds there is more shocking than anything he has encountered in his travels to the past.

During a visit to the Chicago Cubs' Wrigley field, cousins Mike and Kate investigate why someone has been tampering with the famous ivy vines growing on the outfield walls. Includes historical note.