Below is a table from the link. It's the some top leagues ranked for Attendance.
The NHL edged out the NBA over the season.
Out of the Big Five, you can see the world has a grasp on soccer football. One day the MLS will make it in there somewhere.
|League||Sport||Country||Season||Games||Average attendance||Total attendance|
|Major League Baseball||Baseball||United States / Canada||2013||2,426||30,514||74,026,895|
|Nippon Professional Baseball||Baseball||Japan||2013||864||25,517||22,047,491|
|National Hockey League||Ice hockey||United States / Canada||2011–12||1,230[Note 1]||17,455[Note 2]||21,470,155|
|National Basketball Association||Basketball||United States / Canada||2013–14||1,230||17,408||21,411,543|
|National Football League||American football||United States||2013||256||68,401[Note 3]||17,510,569|
|Premier League||Association football||England / Wales[Note 4]||2013–14||380||36,657||13,929,810|
|La Liga||Association football||Spain||2013–14||380||27,053||10,280,362|
|Football League Championship||Association football||England||2013–14||552||16,168||8,989,605|
Perhaps, at first, due to logistical concerns, some overseas teams that could be in Major League Baseball, like a Tokyo or Sydney, could act more as travel teams during more of the regular season.