 The 1957 Chiefs repeated as Western League champions, edging out the Amarillo Gold Sox by a single game.But the Western League was in its twilight years; plagued by declining attendance and the defection of teams such as the Omaha Cardinals and Denver Bears to higher-level circuits, it folded after the 1958 campaign, one in which the Chiefs placed third in the league and in home attendance.The Chiefs played for three more seasons in organized baseball as a member of the Class B Illinois–Indiana–Iowa League and an affiliate of the Chicago White Sox.