Continuity mistake: In the big game the Cubs' manager says to Chet, "You gave me six great innings." But somehow, Henry pitches four innings when there are no extra innings in the game. How unusual.
Continuity mistake: In the final match of the season, the time shown on the scoreboard clock remains the same throughout.
Continuity mistake: When one of the batters is hit, watch closely and the ball is tossed from above.
Continuity mistake: When Henry, his mom and Chet are in the airport, the scene shows Henry and Chet just coming out of the gate and they have no bags in their hands. They start running away from the media with Henry's mom across the skywalk, then it shows them exiting the airport still running. Both Chet and Henry have bags in their hands.
Continuity mistake: In the scene where Henry, his mom and friends are going down the escalator from getting Henry's cast off, Henry's Mom is on one side and the boys are on the other. The side that Henry's Mom is on is going down, but the side that the Boy's are on is going up. They are all standing still for a minute, but they stay side by side while one escalator is going up and the other is going down.
Continuity mistake: While flying on the road trip, the interior shots show a widebody aircraft with twin aisles. The exterior shots show the much smaller 727, which only has a single aisle.
Continuity mistake: Towards the middle of the movie, they show the Cubs shortstop make a play. The stands behind him are completely empty, however, just a few scenes later they are filled with people.
Continuity mistake: When the Cubs are in L. A. Playing the Dodgers, Henry walks when he goes up to bat and when he gets to first base, the pitcher attempts to pick him off. Henry slides back headfirst safely. He gets some dirt on his uniform. They cut to the pitcher and then cut back to Henry, who now has less dirt on his uniform than he did before.
Continuity mistake: When Hedo comes in for the final at-bat, he's a right-handed hitter as always (and Henry's a right-handed pitcher so there's no switch-hitter issue). However, the shot right after shows a hitter digging in on the left side of the plate, then shifts back to a view of Hedo on the right side. The direction of the tip of the plate, which is a pentagram, makes it obvious.