Woods earned more than $10.5 million in giant cardboard checks this year on the PGA Tour and added another $10 million last weekend by winning the FedEx Cup. According to Forbes, that little bonus was enough to push Woods over the $1 billion mark.
http://blogs.golf.com/presstent/2009/10/forbes-tiger-woods-is-first-athlete-to-reach-1-billion.html#ixzz0ShynStKT