Plot

The start of the movie flashes back to 1962 when Benny becomes the "Jet". The main part of the movie is set in 1972, 10 years after the events of The Sandlot. New kids have moved into the neighborhood of San Fernando Valley in Los Angeles. They have started playing baseball in the sandlot. The previous kids have all grown up and moved away. A young boy named Johnnie Smalls, the little brother of Scott Smalls (the first film's protagonist), has heard the legend of "The Great Fear," (a beastly mutated dog, as he puts it when he later on tells the group about the beast) owned by Mr. Mertle, who lives behind the crater. David Durango (Max-Lloyd Jones) is the leader of the boys. Behind the crater; next to Mr. Mertle's home lives the Goodfairer family. Hayley Goodfairer (Samantha Burton), the daughter and her two friends befriend the other boys at first in a census to share the Sandlot, but their relationship burgeons potently into a friendship when they find themselves in a big problem with the beast next door, despite Hayley calling David a little baby, and David calling Hayley a spoiled brat.

One day, when Mac gets an aluminum baseball bat, he hits the ball over the junk wall and afterward they try to retrieve it. But just when they were about to cross over through a passage in the fence, Johnnie stops them and tells them the story of "The Great Fear": how it was born to bite and was different from its sibling puppies. There was a boy who loved the comic book hero named Rapid Rocket, and believed he ran as fast as him. On his first day of school, he past Mr. Mertle's house (who forgot to lock the back gate where the Great Fear was), and The Great Fear got out and chased the boy. It was unknown what happened to him after he was cornered by "The Great Fear". Soon afterward, a wall made of assorted junk was built. Ever since, if anything went over the fence, it would never come out.

The main conflict comes when the Space Shuttle for the future of NASA and the United States space program built by Hayley's father is accidentally launched by Johnnie, who initially thought he'd be test launching it with Mr. Goodfarier, is perplexed by the delay of Haley's father and launches it on his own by total misfortune when the rocket comes back it lands in Mr. Mertle's backyard (home of the great fear) and Hayley along with everyone else frantically try many things to get it back, including hiring the boy called "The Retriever" (Griffin Reilly Evans), but he fails, and decides to retire. Then, just like Benny Rodriguez from the first movie, David decided to go over the wall himself to retrieve the rocket. Here it is revealed that the little boy from the story who was bitten by "The Great Fear" was David. He retrieves it and the dog chases him all over town. When David defeats the dog, it's revealed that the dog's real name is Goliath. After that the kids can be seen running to the sandlot because Goliath got away and realize that he only wanted to get out to see his girlfriend dog, Tiny, who was also behind a fence. As all the kids are leaving Hayley and David share their first kiss and Mr. Mertle decides to not build a new fence because he's tired of kids thinking he's grouchy.

In the final moments of the movie the narrator tells what happened to all the sandlot kids. Mac joined the army after high school, was wounded in the Gulf War

Gulf War

The Persian Gulf War , commonly referred to as simply the Gulf War, was a war waged by a U.N.-authorized coalition force from 34 nations led by the United States, against Iraq in response to Iraq's invasion and annexation of Kuwait.The war is also known under other names, such as the First Gulf...

, won a Purple Heart

Purple Heart

The Purple Heart is a United States military decoration awarded in the name of the President to those who have been wounded or killed while serving on or after April 5, 1917 with the U.S. military. The National Purple Heart Hall of Honor is located in New Windsor, New York...

 and joined the Peace Corps

Peace Corps

The Peace Corps is an American volunteer program run by the United States Government, as well as a government agency of the same name. The mission of the Peace Corps includes three goals: providing technical assistance, helping people outside the United States to understand US culture, and helping...

. Saul and Sammy started a record company for hip-hop music and called it Def Jam Records. Sammy used the money he made from Def Jam to start a gum company known as Kissing Booth Bubblegum. Penny and Jenny raised three kids with their families. Tarquell was abducted by aliens in 1986 and was never seen again. Hayley became a super model and a pitcher for the United States olympic softball team; she won two gold medals. David and Hayley went all the way through High School together, then went their separate ways. Ten years after college they met again. At that meeting it was just like the first time he had ever had a chance to talk to her in grade school—he was so nervous he couldn't speak. So she spoke for him and said, "You're supposed to say, 'Will you marry me?'" and he did. Johnnie Smalls grew up and worked for the jet propulsions lab. Rockets were his life and they always would be. David's PF Flyer's stayed on a telephone high wire for a long time. Then some kid found them but that's 'another story'.