Corrected entry: When Chet Steadman blows out his arm, Sal Martinella tells him that he's going to save Chet for the playoffs. But since the Cubs are currently playing the NLDS, they're already in the playoffs. [Note: "The playoffs" is defined as everything played after the regular season ends, which includes the Division Series.]
Corrected entry: In the final game, after Henry falls and no longer has the ability to pitch fast, all the players on the field panic and don't know what to do. In reality, it would be a pretty simple matter to take Henry out and put another closer in to replace him.
Corrected entry: When Henry throws the ball to home plate from the stands it is a home run, the hitter gets to home plate and is stunned by the throw, slides into home and is ruled safe. He could never have been out, one because it was a home run, and two, because the ball left the field.
Corrected entry: When the Cubs are playing the Dodgers and Henry is on second base, the Dodger pitcher hits the batter and says to Henry "That's for you kid" because Henry was teasing him. The pitcher would have been expelled from the game (according to Major League Baseball rules) since he intentionally hit the batter and the umpire right next to second base most likely heard what he said.
Corrected entry: At the end of the movie, after Henry's little league team mobs him for making the catch in the outfield, they show an overhead shot of the team. Henry throws his fist towards the camera, and we see his World Series ring on his finger. Unfortunately, in little league baseball you are not allowed to wear any kind of jewellery during play, unless it is a medical bracelet or necklace.
Corrected entry: In the final game when Henry is looking at his mom after he finds out it is her baseball glove, they talk normally like they can hear each other. It is hard to carry on a normal conversation in a playoff game a couple hundred feet away from each other.
Corrected entry: During the final game of the Divisional Series, after Henry notices that it was mom who was the former pitcher, she tells him to 'float it,' meaning to pitch underhanded to the batter Heddo. Unfortunately, this is not right, as it is illegal to pitch underhanded in the Major Leagues. That style is only allowed in Slo-Pitch.
Corrected entry: When Henry gets home his mom tells him to do the laundry. He goes downstairs opens up the washer and steps back. He then says bases loaded etc. the last thing he says is that there is a full count. But when the little piece of soap goes into the washing machine, he says "strike one".