License plate changes on the station wagon.
When the car runs out of gas and the rain starts, the driver's rear car door is open and closed in different shots.
When Rickey goes to church in the opening scene, the front of his car has no license plate. Texas requires plates on front and back. Later in the movie, the car has plates on the front and back.
In the beginning of the movie, teen age Rickey Hill is driving a 1973 mustang fastback. The year is 1975 in the movie. How does a 2 year old mustang look beat up like a 40 year old mustang? Also the mustang has modern machined aluminum wheels that were only available in the last 30 years, not 50.
Rickey drives a Mustang Boss 302 that looks like it's been through a war zone. However, the Boss 302 would have only been a few years old when the movie takes place.
The film depicts young Rickey Hill in the 1960s hitting rocks in a hay field with round hay bales with net wrap on them in the background, and again round hay bales with net wrap are shown when the family car runs out of fuel and breaks down on the side of the road. Round bale hay production was not invented until 1972 and net wrap was first introduced on round balers in the late 1980s.
The field where the scout's tryout takes place is Eisenhower Park in Augusta, Georgia. Lake Olmstead Stadium, where Rickey's home run balls landed, and the field where the final game is played are a few miles from each other and nowhere as close as the film shows.
When the boys are playing "sandlot" baseball, one of the signs on the barns says "McDuffie Livestock". McDuffie is a county located near Augusta, Georgia where much of this film was made. There is no location near Fort Worth, Texas named McDuffie.