If the pregnancy-related allegations are true, he's one of the worst kinds of humans in the world. But for now they're just allegations in a big money lawsuit by a (possibly jilted) ex-girlfriend, so I think calling him an ass is a bit premature.
CNN reports that his father died at 44 of a blood clot in his brain. A similar problem claimed the life of one of the kids in my high school graduating class, so I don't think it's steroid-related. Just an immense tragedy for his family and the Cards.