Are you ready for some football history? The NFL started in 1920 and commemorated its 100th season in 2019 with a season-long celebration of "NFL 100."
The game has come a long way in 100 years. The most obvious change from 1920 to today is the size of players, but there also have been many changes in the schemes and roles of individual positions.
This evolution, position by position and era by era, has advanced the game. It’s sometimes hard to notice changes on a year-by-year basis, but when comparing 20-year spans, some patterns emerge.
Time will tell where the league goes 20 years from now, but this is how the NFL has evolved over its first 100 years.
Note: All heights and weights are taken from Pro Football Reference.