The two most popular spectator sports in the U.S. in the early 1900's was Baseball and the ever popular Soccer
Football (soccer) is the most popular sport worldwide.
Soccer, Bull fighting
baseball, football and sumo wrestling
rugby soccer kricket lacrosse
BMX, Skateboarding and Surfing
sumo wrestling and baseball
1.football 2.cricket 3.rugby
Association football is the most popular sport. Other spectator sports that are popular are auto racing, basketball, handball, ice hockey, tennis, and volleyball.