It doesn't matter if you are an athlete or anyone else...if you have sinned (like we all have), all that we can do is ask Jesus for forgiveness. If you have ever had a point in your life where you had to ask Jesus for forgiveness, to help you forgive, or deal with any other life problems that you are having, then I think that you have to love where Kelly is at.
You cant fully be saved unless you are at your lowest point, and if JK truly aked for forgiveness, and is following the Lords word then I'm sure that he is a much better/happier person. I'm also quite sure that he doesn't care what what our opinion of him is. I think that it is great that he was able to change his life, and that he is very luck to have a wife to stick by him. If we could all be this lucky I'm sure we would all be very thankful.