The American Statistical Association is hosting its annual Joint Statistical Meeting in Washington DC later this summer, and there will be a few sections devoted to the use of statistics in sports. There will be a plenary speaker, poster presentations, and invited and contributed paper sessions. There are a number of sports covered in the papers, but only two will be devoted to soccer. One of the two is a paper written by Andrew Swift (University of Nebraska-Omaha) and Shawn Hallinan (formerly of Worcester Polytechnic) on soccer ranking systems. I'm reading Hallinan's Masters thesis right now and will post a review of it in a couple of days.
I'm not sure I would be able to attend that conference, although registration fees are much smaller than those I usually pay for conferences in my working field.