NFL

Penalties

Period: 1920 to 2023

1. The first penalty flag was introduced in 1943 and was made standard in 1948.
2. The most common penalty is offensive holding.
3. Penalties are enforced by refs. https://operations.nfl.com/the-rules/nfl-rules-digest/#penalty-enforcement

Teams

Period: 1920 to 2023

1. There are 32 teams in the NFL.
2. The Chicago Cardinals(Now the Arizona Cardinals) was the first team still playing.
3. There are 3 teams in Florida and California. https://en.wikipedia.org/wiki/History_of_the_National_Football_League#:~:text=The%20Chicago%20Cardinals%20founded%20in,is%20the%20oldest%20NFL%20franchise.

Kansas City Chiefs

Period: 1960 to 2023

1. The Chiefs were originally in Texas.
2. Lamar Hunt founded the Franchise.
3. They have won 3 Super Bowls. https://en.wikipedia.org/wiki/Kansas_City_Chiefs

HOF

Period: 1963 to 2023

1. The HOF was made in 1963.
2. HOF tickets range from $33-Free
3. The Chicago Bears have the most inductees. https://en.wikipedia.org/wiki/Pro_Football_Hall_of_Fame

Super Bowl

Period: 1967 to 2023

1. The Super Bowl has been around for 56 years.
2. The New England Patriots and Pittsburgh Steelers have tied for the most Super Bowl wins, each having 6.
3. The Kansas City Chiefs won the last Super Bowl. http://www.espn.com/nfl/superbowl/history/winners