Sean Astin's character "Hank" is actually a composite of three people: Wales Goebel, a former house builder who began reaching out to area high schools; Hank Erwin, father to co-creators Andrew Erwin and Jon Erwin, who was the team's chaplain for two years; and Mike Huckabee, whose experience at Explo 72 informed some of the dialogue.
Caleb's father Jeremiah played cornerback in the NFL for 6 seasons for two teams. The Tampa Bay Buccaneers & the Denver Broncos, and he himself went to Alabama as well.
The football scenes were filmed at: the Hueytown football field in Hueytown, Alabama; the Berry Middle School football field in Hoover, Alabama; and Legion Field in Birmingham, Alabama.
Legendary voice of Crimson Tide football announcer Eli Gold did some of the announcing for the high school games in the movie.
The group recitation of "The Lord's Prayer" is a compilation of audio clips submitted by churches from around the U.S. There were only approximately one thousand extras and there was a need for forty-two thousand voices. The 2015 Harvest Crusade in Anaheim, California, inspired by the movie, recorded over thirty thousand people reciting The Lord's Prayer, but was not the source for this movie's audio.