Mark McGwire may still refuse to talk about the past, but his little brother is apparently more than happy to spill the family secrets about performance-enhancing drugs. Deadspin.com reported Wednesday that Jay McGwire has been shopping a book proposal to major publishing houses that claims he introduced the scandal-stained slugger to steroids and that he also used human growth hormone. In the proposal for "The McGwire Family Secret," Jay McGwire says he used a $150,000 insurance settlement from a BB gun accident that cost him an eye to purchase steroids. Jay McGwire writes that Mark started juicing after watching his brother build himself into a 6-3, 320-pound professional bodybuilder. According to Deadspin.com, Jay Mc-Gwire claims he introduced his brother to a steroid dealer shortly after he won a bodybuilding contest in May 1994. The supplier, who was also a trainer, explained how different drugs affected the body and answered his brother's questions.