good for you for registering and possibly matching! i've been in the registry since the late 90s and never once matched - i joke that there must not be many irish-swedes in need! but, i have a very good friend who has twice saved someone's life via bone marrow donation. i will shoot him an email and ask him. he is not really an 'athlete' per see, but was in the navy at the time and was very physically active, so he may be able to give some insight. he is always happy to talk about his experiences!