Short answers, pulled from the story.
The name change from the American Professional Football Association to the National Football League became official on the 24th of June 1922. The new name was borrowed from the National League of Professional Baseball Clubs, the oldest professional sports league in the United States.
The Canton Bulldogs won the 1922 NFL championship with a 10-0-2 record. It was the first of two consecutive titles for the Bulldogs, coached by Guy Chamberlin.
The Packers were expelled after player-coach Curly Lambeau was charged with recruiting three active Notre Dame players, Hunk Anderson, Hec Garvey, and Ojay Larson, in violation of league rules. Owner John Clair accepted blame and agreed to the team's withdrawal at the January 1922 owners meeting in Canton, Ohio.
NFL secretary Carl Storck sent Lambeau a blank franchise application on the 9th of June 1922, inviting him to the owners meeting at the Hollenden Hotel in Cleveland. Lambeau paid a new $500 franchise fee and a $1,000 performance bond, registering the team as the Green Bay Football Club. The team played the 1922 season as the Green Bay Blues before officially reclaiming the Packers name in 1923.
League president Joe F. Carr reported total attendance of more than 400,000 across the 75 games played by the 18 teams in the 1922 season.
The 1921 Packer-Notre Dame scandal revealed that pro teams in Taylorville and Carlinville, Illinois had secretly recruited active college players, including Notre Dame and University of Illinois athletes, amid a local gambling frenzy. The Green Bay Packers were also implicated, prompting colleges to disqualify numerous players and the NFL to require a $1,000 bond from each team to deter future violations.