Dwayne Johnson said he came up with the idea for his character to be such a huge Elvis fan, and suggested the idea to the writers, who loved it and added it to the script. Johnson later said that when they asked how he came up with the idea, Johnson responded that he is Elvis' biggest fan, and much of the Elvis memorabilia his character owns actually belongs to Johnson.
Dwayne Johnson's character, Joe Kingman, suffers a separated shoulder that temporarily knocks him out of the big game. In real life, The Rock actually did suffered a season-ending shoulder separation while playing defensive tackle as a freshman at the University of Miami.
Includes a lot of references to Elvis Presley, including songs and posters. Those were added by director Andy Fickman and Dwayne Johnson who both are Elvis fans.
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.