It is mainly for Soccer but used for some other events, apparently it hosted England v Ireland in the Churchill Cup (Rugby).
I guess there are certain economics of building a stadium, if it is too small you miss the opportunity to host
certain events.
It is actually the second smallest by 86!
Some of the MSL stadiums have actually artificially reduced their capacity apparently (to 20,000)
https://en.wikipedia.org/wiki/List_o...occer_stadiums
There is an article about MSL stadium capacity here
http://bleacherreport.com/articles/9...a-huge-mistake