The most popular sports leagues in America are the NFL (National Football League), NBA (National Basketball Association), and MLB (Major League Baseball). The NFL leads with massive viewership and fan engagement. The NBA is known for its global reach and dynamic players. MLB, America’s oldest major league, remains a staple despite shifts in popularity. Other notable leagues include the NHL (hockey), MLS (soccer), and UFC (mixed martial arts), each growing steadily in fans and media coverage.