"American Underdog" is a biographical sports drama film that tells the inspiring story of Kurt Warner, a former professional American football quarterback. The film chronicles Warner's journey from working at a grocery store to becoming a Super Bowl champion and NFL MVP, highlighting his perseverance and determination against the odds. The movie showcases Warner's early life, including his struggles in college football and his time in the Arena Football League. It emphasizes the support of his wife, Brenda Warner, and their family's challenges, ultimately portraying a message of hope and resilience in pursuing one's dreams.