I dont think its true at all that Pittsburgh isn’t big in soccer, highschool soccer has grown tremendously over the past ten years and you can go anywhere around Pittsburgh and there are leagues. Just cuz there isnt a team in or close to Pittsburgh doesnt mean its not big.
Anyways back on topic…Beckham isn’t going to make or break MLS because of his position, lets not forget he is an outside midfielder, not some flashy striker thats gonna score amazing goals and be on sportscenter all the time. Yes he is good a free kicks but those are as common as some break away or something similar.
Soccer is getting bigger though, you finally see the U-20 U.S. team is winning and this is because the sport is getting more money. It will continue to grow although I don’t think it will be as popular as football here in the states.