[ColinCochrane]

MLS has been doing rather well. Attendance has been increasing steadily for the past decade[1].

The NHL, while certainly not as popular as the NFL or MLB, is pretty consistent as far as attendance numbers go, comparable to the NBA [2]

[1] https://en.wikipedia.org/wiki/Major_League_Soccer_attendance...

[2] https://en.wikipedia.org/wiki/Major_League_Soccer_attendance...