Title: Use of foreign players in the first Czech league of American football Objectives: The objective of this thesis is to determine the game and club contribution of foreign players (as defined by the CAAF) who played in the first league of American football in the Czech Republic in 2013-2019. To compare their game efficiency with other players and to determine whether foreign players had an impact on the development of the membership base, spectator attendance and league balance. Methods: The thesis analyses secondary data obtained from the web portal of the Czech Association of American Football and internal data provided by the association itself. Semi-structured interviews were conducted with eight representatives of first league Amer...