It was impeccably dangerous due to the helmets inability to work up to proper standards that at which they needed to meet. Also, for other links that pertain to this question...http://alliance.ed.uiuc.edu/cdrom/hononegah/sports_folder/changes.htm http://dm12700.wordpress.com/football-in-the-1920s/(To improve the former answer, that was previously given.)
Mah Jong, crossword puzzles, football, etc. were popular games in the 1920s.
Hundreds, as college football started in the 1870s, and the NFL started in the 1920s.
boxing, baseball, football, dodgeball, basketball,
Doing the harlem shake on the feild
The National Football League (NFL) was created.
Dangerous equipment and not that much padding
Shoulder pads of the 1920s were made of leather and were somewhat heavier than the shoulder pads worn today.
Some sports that were played in the 1920s include golf, football, baseball, and boxing. Other sports were hockey, tennis, rugby, and cricket.