When Joe comes back into the Championship game you see the side line marker stating its 3rd down. He runs a play and the announcer says it is now 2nd down.
When Peyton gives Joe the cookie in the car, the bites he takes out of it keep changing between shots.
When Sanders catches the winning touchdown pass in the championship game there is clearly an opponent inside Sander's arm trying to knock the ball out. In the next shot the nearest player is too far away to have done anything, and he would have been closer.
Before he does the commercial (when he has a lisp from an allergic reaction), the small logo for the team's name 'Boston' disappears for a shot, and then reappears.
In the opening scene football game, "Never say no" Joe drops back to pass from the 25 yard line, then decides to keep it and run with it. As he begins to run to the end zone, he takes off from the 15 yard line.
The movie is stated to take place in January, but Joe and Peyton watch ESPN's coverage of the 2007 Subway 500, which was on Oct. 21st of that year.
At the end, though it is supposed to be a pro football game, the ball has the white markings appropriate for a college game. Pro footballs do not have these markings.
When Joe is looking through the newspaper cutouts, the marriage announcement states Peyton's mom's name as Kelly-Kingman instead of Sara, as she had been previously referred to.
The scene where the camera pans the stadium about 3/4 of the way through the film looks like a scale model with a fake background.
Statements are made that it's January in Boston, but the leaves on the trees in the surrounding areas, and the attire worn during the film, suggest very clearly that it's early fall.
When Joe's team members come to visit Peyton in the hospital, Clarence Monroe drops all of the stuffed animals he brought for her and reveals the zipper to his pants is down.
When Peyton tells Joe that she wasn't feeling good and Joe tells her not to give up, she says, "I know," but her lips don't move.
It looks like the same stadium is used for regular season games and the championship game, by the amount and location of wear on the field. You would think that a championship game in Arizona would have better looking striping, etc. than a regular season game near Boston.
When Peyton is having a reaction to her dessert, Monique says that the nearest hospital is at Woodrow and Ninth. Those streets don't cross and neither has a hospital.