https://www.ranker.com/crowdranked-list/most-popular-american-sports
https://tradingeconomics.com/united-states/population
Volleyball: https://en.wikipedia.org/wiki/Volleyball_in_the_United_States
https://www.statista.com/statistics/191714/participants-in-court-volleyball-in-the-us-since-2006/
https://www.tutorialspoint.com/volleyball/volleyball_quick_guide.htm
Rugby: https://en.wikipedia.org/wiki/USA_Rugby
Skiing:
https://www.statista.com/statistics/191312/participants-in-skiing-in-the-us-since-2007/
Golfer:
https://www.statista.com/statistics/191907/participants-in-golf-in-the-us-since-2006/
Tennies
https://www.statista.com/statistics/191966/participants-in-tennis-in-the-us-since-2006/
https://en.wikipedia.org/wiki/Tennis_in_the_United_States
Wrestling:
https://www.statista.com/statistics/191989/participants-in-wrestling-in-the-us-since-2006/
https://www.teamusa.org/USA-Wrestling/Features/2018/August/27/High-School-Wrestling-participation-increases-in-all-categories
Fishing:
https://www.statista.com/statistics/191238/participants-in-fishing-in-the-us-since-2006/
https://outdoorindustry.org/wp-content/uploads/2015/03/2018-Special-Report-on-Fishing_FINAL.pdf
Table tennies
https://www.statista.com/statistics/191959/participants-in-table-tennis-in-the-us-since-2006/
https://en.wikipedia.org/wiki/USA_Table_Tennis
Snowboarding:
https://www.statista.com/statistics/191319/participants-in-snowboarding-in-the-us-since-2007/
https://en.wikipedia.org/wiki/Snowboarding
Beach Volleyball:
https://www.statista.com/statistics/191708/participants-in-beach-volleyball-in-the-us-since-2006/
https://en.wikipedia.org/wiki/United_States_national_beach_volleyball_team
Gymnastic:
https://www.statista.com/statistics/191908/participants-in-gymnastics-in-the-us-since-2006/
https://en.wikipedia.org/wiki/USA_Gymnastics
Bicycling:
https://en.wikipedia.org/wiki/USA_Cycling
https://www.statista.com/statistics/191204/participants-in-bicycling-in-the-us-since-2006/
Skateboading:
https://en.wikipedia.org/wiki/Skateboarding
https://www.statista.com/statistics/191308/participants-in-skateboarding-in-the-us-since-2006/
Surfing:
https://www.statista.com/statistics/191328/participants-in-surfing-in-the-us-since-2006/
https://en.wikipedia.org/wiki/Surfing_in_the_United_States
Karate:
https://en.wikipedia.org/wiki/Karate_in_the_United_States
https://www.statista.com/statistics/191917/participants-in-martial-arts-in-the-us-since-2006/
Kayaking:
https://www.statista.com/statistics/191249/participants-in-kayaking-in-the-us-since-2006/
Roller Skating:
https://www.statista.com/statistics/191928/participants-in-roller-skating-in-the-us-since-2006/
Rowing:
https://www.quora.com/How-many-rowers-are-there-in-the-US
https://en.wikipedia.org/wiki/College_rowing_(United_States)
Water Polo:
https://total-waterpolo.com/how-many-people-play-water-polo/
https://en.wikipedia.org/wiki/College_rowing_(United_States)
Badminton:
https://en.wikipedia.org/wiki/Badminton_in_the_United_States
https://www.statista.com/statistics/191754/participants-in-badminton-in-the-us-since-2006/
Lacrosse:
https://www.statista.com/statistics/490367/lacrosse-total-participation-us/
https://en.wikipedia.org/wiki/Lacrosse_in_the_United_States
Ice Skating:
https://www.statista.com/statistics/191909/participants-in-ice-skating-in-the-us-since-2006/
Weight Lifting
https://www.quora.com/What-percent-of-people-lift-weights