Short answers, pulled from the story.
The National Football League was founded on the 20th of August 1920 during a meeting inside the Jordan and Hupmobile auto showroom in Canton, Ohio. Representatives from the Akron Pros, Canton Bulldogs, Cleveland Indians, and Dayton Triangles gathered to establish the American Professional Football Conference.
The National Football League consists of thirty-two teams as of its expansion in 2002. This structural change shifted division structures from three divisions per conference to four while reducing wild card berths from three to two per conference.
Each team in the National Football League now plays one bye week during an eighteen-week regular season running from early September to early January. The league officially implemented a seventeen-game schedule in March 2021 after securing agreement from the National Football League Players Association.
Roger Goodell became commissioner of the National Football League in 2006 succeeding Paul Tagliabue who served seventeen years until retirement. The commissioner holds broad authority including negotiating television contracts, disciplining owners or employees violating league bylaws, and suspending individuals up to lifetime bans.
On the 3rd of October 1920, the first full week of league play commenced with the Rock Island Independents defeating the non-league St. Paul Ideals by a score of 48, 0 at Douglas Park. This event marked the beginning of official competition following the formation of the American Professional Football Conference.