The sport of football has become one of the most widely loved and watched sports in the United States. Fans of football are extremely dedicated to the sport and form very personal, emotional attachments to teams within the National Football League. Through studying these fans, three main analysis topics will be addressed in this thesis: the established fan knowledge that creates rules within the fandom on how a fan participates and the exceptions to those rules, the need that fan's who do not fit into the normative patterns of the fandom feel to explain their motivations, and the degree of fanship that can be measured through a fan's explanation for their deviant behavior. For this fandom analysis, two sets of data will be referenced throughout the discussion. The first is anecdotal data pulled from various reddit threads on the personal experiences of each fan as well as some opinion sharing about the National Football League fandom. The second set of data is primary data that I have compiled via a survey. The established fan knowledge within this fandom is two fold: First, fans choose their team for a specific reason (usually based off of the team their parent's are a fan of or the state they grew up in), which typically takes place by age twelve. Secondly, once a fan chooses a team, they should stick with that team through their entire fanship. This second piece of fan knowledge is the most important rule within the fandom. This idea of loyalty is what guides fan participation. Identifying this rule led me to my main question about this fandom \u2014 if fans are so dedicated to their chosen team, what does it mean when someone switches to a new team. I feel that this breaking of a bond that seems so personal to fans is important and should be researched. This brought me to researching these fans that have switched teams, learning why, as well as what this group of fans can say about the National Football League fandom as a whole.