NFL most popular for 30th year in row (ESPN)
In 2014, 35 percent of fans call the NFL their favorite sport, followed by Major League Baseball (14 percent), college football (11 percent), auto racing (7 percent), the NBA (6 percent), the NHL (5 percent) and college basketball (3 percent).
A bit surprised how low the NBA is here. And how the NHL is higher than college basketball, but that doesn't mean more people watch the NHL than college basketball. I don't really consider auto racing a sport, but that's a separate discussion.
Nine percent fewer fans call baseball their favorite sport over the 30-year span, the biggest drop of any sport. The polling numbers suggest that the sport hasn't been able to recover from a popularity standpoint from 1994, when a strike forced the cancellation of the World Series.